Flopy

* New features:

* [feat(mf6-lake)](https://github.com/modflowpy/flopy/commit/73a44059d18ee37f16d8e8fc90c231a0c9b16cf7): Add helper function to create lake connections (#1163). Committed by jdhughes-usgs on 2021-08-04.
* [feat(data storage)](https://github.com/modflowpy/flopy/commit/08b95ea0b4b582567bbc99ff89f9923910a33d70): Data automatically stored internally when simulation or model relative path changed (#1126) (1157). Committed by spaulins-usgs on 2021-07-29.
* [feat(get_reduced_pumping)](https://github.com/modflowpy/flopy/commit/86b270d2cc085f92373c1623cb61a23d2befc70e): Update to read external pumping reduction files (#1162). Committed by Joshua Larsen on 2021-07-29.
* [feat(raster)](https://github.com/modflowpy/flopy/commit/3ffedb45c4fa017ff64a4d579314c12386696068): Add option to extrapolate using ``nearest`` method (#1159). Committed by jdhughes-usgs on 2021-07-26.
* [Feat(ZoneBudget6)](https://github.com/modflowpy/flopy/commit/04fe7e4a3c67cb068de444a2979a3528ccbc3e60): Added zonebudget6 class to zonbud.py (#1149). Committed by Joshua Larsen on 2021-07-12.
* [feat(grid)](https://github.com/modflowpy/flopy/commit/0560a4d444c1f0ecd90319c41a6942c8e78dac26): Add thickness method for all grid types (#1138). Committed by jdhughes-usgs on 2021-06-25.
* [feat(flopy for mf6 docs)](https://github.com/modflowpy/flopy/commit/fbba027a6c6c59553b0030f6bac2b9f68a14198c): Documentation added and improved for flopy (#1121). Committed by spaulins-usgs on 2021-06-01.
* [Feat(.output)](https://github.com/modflowpy/flopy/commit/df843e00dc9df208e5b16e7a0523456f1e80c004): Added output property method to mf6 packages and models (#1100). Committed by Joshua Larsen on 2021-04-23.


* Bug fixes:

* [fix(flopy_io)](https://github.com/modflowpy/flopy/commit/5098c56085ee8498654ecf76aa5c71f1067466b6): Limit fixed point format string to fixed column widths (#1172). Committed by jdhughes-usgs on 2021-08-06.
* [fix(modpath7)](https://github.com/modflowpy/flopy/commit/9020bf362ea6418a39c12def5c74eb98ecc51746): Address #993 and 1053 (1170). Committed by jdhughes-usgs on 2021-08-05.
* [fix(lakpak_utils)](https://github.com/modflowpy/flopy/commit/08dfff9420a50e66994575344cfd75a9fb7b1173): Fix telev and belev for horizontal connections (#1168). Committed by jdhughes-usgs on 2021-08-05.
* [fix(mfsfr2.check)](https://github.com/modflowpy/flopy/commit/cf5ee1c885da2294a385cc3e436aa7a9c68cd143): Make reach_connection_gaps.chk.csv a normal csv file (#1151). Committed by Mike Taves on 2021-07-27.
* [fix(modflow/mfrch,mfevt)](https://github.com/modflowpy/flopy/commit/b780bfb9721156fbdd9a96d99cf7b084d99ab452): Mfusg rch,evt load and write fixes (#1148). Committed by Chris Nicol on 2021-07-13.
* [fix(Raster)](https://github.com/modflowpy/flopy/commit/679c8844704a4e9b337af06c1826984c2715371f): Update default dtypes to include unsigned integers (#1147). Committed by Joshua Larsen on 2021-07-12.
* [fix(utils/check)](https://github.com/modflowpy/flopy/commit/345e0fbfdc007b688982c09bfa82841d56ac5cf7): File check for mfusg unstructured models (#1145). Committed by Chris Nicol on 2021-07-09.
* [fix(list parsing)](https://github.com/modflowpy/flopy/commit/148087e2b6f989d8625a2d345fbe1069b58bd99b): Fixed errors caused by parsing certain lists with keywords in the middle (#1135). Committed by spaulins-usgs on 2021-06-25.
* [fix(plotutil.py, grid.py)](https://github.com/modflowpy/flopy/commit/e566845172380e3eae06981ca180923d2362ee56): Fix .plot() method using mflay parameter (#1134). Committed by Joshua Larsen on 2021-06-16.
* [fix(map.py)](https://github.com/modflowpy/flopy/commit/4cfb11db25c17f70708b47bec79f88479d35a3fe): Fix slow plotting routines (#1118). Committed by Joshua Larsen on 2021-06-11.
* [fix(plot_pathline)](https://github.com/modflowpy/flopy/commit/fa98069de665fcbd45c4b468bef9ac484833c2f9): Update modpath intersection routines (#1112). Committed by Joshua Larsen on 2021-06-11.
* [fix(gridgen)](https://github.com/modflowpy/flopy/commit/ce5dcf9254bc5714d3b4bd5e888bdf4860cd5ecb): Mfusg helper function not indexing correctly (#1124). Committed by langevin-usgs on 2021-05-28.
* [fix(numpy)](https://github.com/modflowpy/flopy/commit/6c328e1d57a07b452b08575806c1ef78c1277fe4): Aliases of builtin types is deprecated (#1105). Committed by Mike Taves on 2021-05-07.
* [fix(mfsfr2.py)](https://github.com/modflowpy/flopy/commit/870c5773307761af977934a0b6fdfa84e7f30e72): Dataset 6b and 6c write routine, remove blank lines (#1101). Committed by Joshua Larsen on 2021-04-26.
* [fix(performance)](https://github.com/modflowpy/flopy/commit/4104cf5e6a35e2a1fd6183442962ae5cb258fa7a): Implemented performance improvements including improvements suggested by briochh (#1092) (1097). Committed by spaulins-usgs on 2021-04-12.
* [fix(package write)](https://github.com/modflowpy/flopy/commit/58cb48e7a6240d2a01039b5a5ab3c67c5111662c): Allow user to define and write empty stress period blocks to package files (#1091) (1093). Committed by scottrp on 2021-04-08.
* [fix(imports)](https://github.com/modflowpy/flopy/commit/36426534fae226570884f82a93a42374bd0019da): Fix shapely and geojson imports (#1083). Committed by jdhughes-usgs on 2021-03-20.
* [fix(shapely)](https://github.com/modflowpy/flopy/commit/ff7b8223a9184ffbe6460ae857be45533d5c874a): Handle deprecation warnings from shapely 1.8 (#1069). Committed by Mike Taves on 2021-03-19.
* [fix(mp7particledata)](https://github.com/modflowpy/flopy/commit/44ebec2cd6a4a79a2f3f7165eae8ced7da0340c8): Update dtype comparison for unstructured partlocs (#1071). Committed by rodrperezi on 2021-03-19.
* [fix(get_file_entry)](https://github.com/modflowpy/flopy/commit/5604ef78fb8b2366fc7d5d827e68413ac602c7fa): None text removed from empty stress period data with aux variable (#1080) (1081). Committed by scottrp on 2021-03-19.
* [fix(data check)](https://github.com/modflowpy/flopy/commit/179fc4e06b6317f12adcc826597f9586317fc7c0): Minimum number of data columns check fixed (#1062) (1067). Committed by spaulins-usgs on 2021-03-17.
* [fix(plotutil)](https://github.com/modflowpy/flopy/commit/605366bba794a7ca75b67ef956dc232e20c79c48): Number of plottable layers should be from util3d.shape[0] (#1077). Committed by Mike Taves on 2021-03-15.
* [fix(data check)](https://github.com/modflowpy/flopy/commit/cb04f9d2ac55f3cbc320ef212945f69045222366): Minimum number of data columns check fixed (#1062) (1065). Committed by spaulins-usgs on 2021-02-19.

* New features:

* [feat(voronoi)](https://github.com/modflowpy/flopy/commit/71162aef76ad025c42753e82ddee14bdeef1fd22): Add voronoigrid class (#1034). Committed by langevin-usgs on 2021-01-05.
* [feat(unstructured)](https://github.com/modflowpy/flopy/commit/0f7a0f033ba0bdff19621e824e721d032a6d1313): Improve unstructured grid support for modflow 6 and modflow-usg (#1021). Committed by langevin-usgs on 2020-11-27.


* Bug fixes:

* [fix(createpackages)](https://github.com/modflowpy/flopy/commit/8a2cffb052d0c33a4699edb9554b039fa871f00f): Avoid creating invalid escape characters (#1055). Committed by Mike Taves on 2021-02-17.
* [fix(DeprecationWarning)](https://github.com/modflowpy/flopy/commit/7d36b1c7f67a9eddeda122644295cf23c0573c8d): Use collections.abc module instead of collections (#1057). Committed by Mike Taves on 2021-02-15.
* [fix(DeprecationWarning)](https://github.com/modflowpy/flopy/commit/39c0ecba20bd54f2eafd8350151e60efbcc5c162): Related to numpy (#1058). Committed by Mike Taves on 2021-02-15.
* [fix(numpy)](https://github.com/modflowpy/flopy/commit/943ace46c686cbdbfdc327a3016da5942211ab7e): Aliases of builtin types is deprecated as of numpy 1.20 (#1052). Committed by Mike Taves on 2021-02-11.
* [fix()](https://github.com/modflowpy/flopy/commit/3ccdd57e390b94c4f23daa3d46554efd39e8ec9d): fix(get_active) include the cbd layers when checking layer thickness before BAS is loaded (#1051). Committed by Michael Ou on 2021-02-08.
* [fix(dis)](https://github.com/modflowpy/flopy/commit/5bfdf715514bbefd3f9d9a2e79d5c486e48f1896): Fix for dis.get_lrc() and dis.get_node() (#1049). Committed by langevin-usgs on 2021-02-04.
* [fix()](https://github.com/modflowpy/flopy/commit/3088e51bb546afc5a68103a81821c750480263b7): fix(modflow/mflpf) mfusg unstructured lpf ikcflag addition (#1044). Committed by Chris Nicol on 2021-02-01.
* [fix(print MFArray)](https://github.com/modflowpy/flopy/commit/b8322ddc52241d3c2a49c4ebdf2e8865c6f36bb9): Fixed printing of layered arrays - issue #1043 (1045). Committed by spaulins-usgs on 2021-01-29.
* [fix(GridIntersect)](https://github.com/modflowpy/flopy/commit/369942c7ed3171927f50a20c27b951ed062eb0e1): Fix vertices for offset grids (#1037). Committed by Davíd Brakenhoff on 2021-01-13.
* [fix(PlotMapView.plot_array())](https://github.com/modflowpy/flopy/commit/7cb429f81a9206fa450cceff21c695faf01fce41): Fix value masking code for masked_values parameter (#1026). Committed by Joshua Larsen on 2020-12-03.
* [fix(sfr ic option)](https://github.com/modflowpy/flopy/commit/0ab929e01fdf2a2205d268e51364630d9bbaf9c5): Made ic optional and updated description (#1020). Committed by spaulins-usgs on 2020-11-27.

* New features:

* [feat(mf6)](https://github.com/modflowpy/flopy/commit/133f07fe2c0c418aa139ddae1429605ef5a1f253): Update t503 autotest to use mf6examples zip file (#1007). Committed by jdhughes-usgs on 2020-10-21.
* [feat(mf6)](https://github.com/modflowpy/flopy/commit/0bc91e4c2873ee2783968fd28b98c67c883457c0): Add modflow 6 gwt dfn and classes (#1006). Committed by jdhughes-usgs on 2020-10-21.
* [feat(geospatial_util)](https://github.com/modflowpy/flopy/commit/9ad6732c4b0c9cf26cf2deac0d95fee2d6859f97): Geospatial consolidation utilities (#1002). Committed by Joshua Larsen on 2020-10-19.
* [feat(cvfdutil)](https://github.com/modflowpy/flopy/commit/fdcc35ff5a7e7a809d7d10eff914881351a8f738): Capability to create disv nested grids (#997). Committed by langevin-usgs on 2020-10-02.
* [feat(cellid not as tuple)](https://github.com/modflowpy/flopy/commit/2763a1d5ef0a886582d682cc27f02f4a5cb52693): List data input now accepts cellids as separate integers (#976). Committed by spaulins-usgs on 2020-08-27.
* [feat(set_all_data_external) ](https://github.com/modflowpy/flopy/commit/46e041bc01e47b65ea8ba0420609cecc52ff74c0): New check_data option (#966). Committed by spaulins-usgs on 2020-08-17.


* Bug fixes:

* [fix(gridintersect)](https://github.com/modflowpy/flopy/commit/5091182a7c71d30bf0b62e2e257cb13b4652d7cf): Use linestrings and structured grid (#996). Committed by Tom van Steijn on 2020-09-25.
* [fix()](https://github.com/modflowpy/flopy/commit/44d8b5b68c6624b5c20e78e2e7652c7429ba088a): fix(extraneous blocks and zero length data in a list) (#990). Committed by spaulins-usgs on 2020-09-03.
* [fix(internal)](https://github.com/modflowpy/flopy/commit/af28ed8ffc7e6d6fd19d82a3f9a1d496514ef6b7): Flopy fixed to correctly reads in internal keyword when no multiplier supplied. also, header line added to package files. (#962). Committed by spaulins-usgs on 2020-08-13.
* [fix(mfsfr2.py](https://github.com/modflowpy/flopy/commit/573da13fd8a8069ea3d8fb189d8033eb20fc4eed): Find_path): wrap find_path() so that the routing dictionary (graph) can still be copied, but won't be copied with every call of find_path() as it recursively finds the routing connections along a path in the sfr network. this was severely impacting performance for large sfr networks. (#955). Committed by aleaf on 2020-08-11.
* [fix(958)](https://github.com/modflowpy/flopy/commit/2fd9326534d2782428111ae47dfac1af0c21e04d): Fix gridintersect._vtx_grid_to_shape_generator rtree for cells with more than 3 vertices (#959). Committed by mkennard-aquaveo on 2020-08-07.
* [fix(GridIntersect)](https://github.com/modflowpy/flopy/commit/a6b6c57150e9b28022bdc878090d0f1f9b0af261): Fix crash intersecting 3d points that are outside… (#957). Committed by mkennard-aquaveo on 2020-08-05.
* [fix(mvr)](https://github.com/modflowpy/flopy/commit/49b4aa27e84c8307e8ff15cc6d1a661031af6776): Added documentation explaining the difference between the two flopy mvr classes (#950). Committed by spaulins-usgs on 2020-07-31.
* [fix(check)](https://github.com/modflowpy/flopy/commit/cd81a0911374eb1af2a9fd5ab31a3c6df7baf675): Get_active() error for confining bed layers (#937). Committed by Michael Ou on 2020-07-29.
* [fix(rcha and evta)](https://github.com/modflowpy/flopy/commit/3640b1a15667b30b04a21a0ba55b6c063747a1b6): Irch and ievt arrays now zero based. fix for issue #941. also changed createpackages.py to always produce python scripts with unix-style line endings. (949). Committed by spaulins-usgs on 2020-07-29.
* [fix(lgrutil)](https://github.com/modflowpy/flopy/commit/3e7e3679deb0d440a139a6d2a71ad174c4d65a12): Corrected bug in child to parent vertical exchanges (#948). Committed by langevin-usgs on 2020-07-27.
* [fix(time series slowness)](https://github.com/modflowpy/flopy/commit/47572f0ecbc024df1dfa57bcdff11175416f6f26): Speeds up performance when a large number of time series are used by a single stress package (#943). Committed by spaulins-usgs on 2020-07-17.
* [fix](https://github.com/modflowpy/flopy/commit/d16411dda8eae387da3bfbb8c2c9a32d069711e6): Restore python 3.5 compatibility (modulenotfounderror -> importerror) (#933). Committed by Mike Taves on 2020-07-09.
* [fix(read binary file)](https://github.com/modflowpy/flopy/commit/f437e8bcd135fee09e6fd4aa7d4691e589ab39c0): Fix for reading binary files with array data (#931). Committed by spaulins-usgs on 2020-06-30.
* [fix(idomain)](https://github.com/modflowpy/flopy/commit/27e4191875a59c09a2339a481d84f1052c89f0f3): Data checks now treat all positive idomain values as active (#929). Committed by spaulins-usgs on 2020-06-29.
* [fix(Modpath7Sim)](https://github.com/modflowpy/flopy/commit/b27fccdee589c772e6e66160f27d60a8dd485645): Fix timepointinterval calculation for timepointoption 3 (#927). Committed by jdhughes-usgs on 2020-06-26.

* New features:

* [feat(ModflowAg)](https://github.com/modflowpy/flopy/commit/c89b2d83a81125c986c05df57ffc980fe10fd663): Add the modflowag package for nwt (pull request #922). Committed by Joshua Larsen on 2020-06-25.
* [feat(GridIntersect)](https://github.com/modflowpy/flopy/commit/176c9b45eb158217b1aeb0657d60ed06739e53e6): #902 (903). Committed by Davíd Brakenhoff on 2020-06-10.
* [feat(mbase)](https://github.com/modflowpy/flopy/commit/4fc61d573c108be7601a2e8479a86c35040998c2): Suppress duplicate package warning if verbose is false (#908). Committed by Hughes, J.D on 2020-06-09.
* [feat(ModflowSms)](https://github.com/modflowpy/flopy/commit/f539d072e20cb5654fab8826ac3bbaf7d1f8b52e): Add support for simple, moderate, complex (#906). Committed by langevin-usgs on 2020-06-09.
* [feat(str)](https://github.com/modflowpy/flopy/commit/3182f57479c1a45d614151867f419a0d35f7f2c2): Add irdflg and iptflg control to str (#905). Committed by Hughes, J.D on 2020-06-09.
* [feat(Mf6ListBudget)](https://github.com/modflowpy/flopy/commit/04b74bd8fb4ed71cf0ed07f721204296b9fd4388): Add support for mf6 budgets with multiple packages with same name (#900). Committed by langevin-usgs on 2020-06-02.
* [feat(mfchd.py)](https://github.com/modflowpy/flopy/commit/88fbd4ccdf837dd4b2a70795522fcaa0a2470dfe): Prevent write chk-file always (#869). Committed by Ralf Junghanns on 2020-05-08.
* [feat(set all data external)](https://github.com/modflowpy/flopy/commit/0336b5c4f6c62994a7ffea26318240fbaa0ca1fb): Set all data external for simulation (#846). Committed by spaulins-usgs on 2020-04-08.
* [feat(vtk)](https://github.com/modflowpy/flopy/commit/e43dccc29d87e182aaa82687968d98391fa78e5d): Improve export at vertices (#844). Committed by Etienne Bresciani on 2020-04-06.
* [feat(netcdf)](https://github.com/modflowpy/flopy/commit/fb942b4675c335247b81f9287bdb8cdb3bcf360b): Use modern features from pyproj>=2.2.0 (#840). Committed by Mike Taves on 2020-03-31.
* [feat(vtk)](https://github.com/modflowpy/flopy/commit/b975368a9c5a25df616b024a08450056e92b6426): Export vectors to vtk. Committed by Etienne Bresciani on 2020-03-31.
* [feat(vtk)](https://github.com/modflowpy/flopy/commit/13c1dd28b9c470c70aac624b70888f5f6badf795): Export in .vti and .vtr when possible. Committed by Etienne Bresciani on 2020-03-28.
* [feat(vectors)](https://github.com/modflowpy/flopy/commit/1284871e5b8ed26c9d925e28295c2098a76b1bc9): Vector plots when stresses applied along boundaries (#817). Committed by langevin-usgs on 2020-03-05.
* [feat(plot_bc)](https://github.com/modflowpy/flopy/commit/207cd1ee5dde116e5b8912232d9b94a9c9304161): Updated plot_bc for maw, uzf, sfr, and multiple bc packages (#808). Committed by Joshua Larsen on 2020-02-11.
* [feat(disl grids)](https://github.com/modflowpy/flopy/commit/469727bcb695ee42611f3df227830ef3b25853f6): Support for 1d vertex grids. fix for writing gridlines to shapefile (#799). Committed by spaulins-usgs on 2020-02-04.
* [feat(zb netcdf)](https://github.com/modflowpy/flopy/commit/491f4fe3923a942e9a0d535a7da54173c4df1204): Zonebudget netcdf export support added (#781). Committed by Joshua Larsen on 2020-01-17.
* [feat(mf6 checker)](https://github.com/modflowpy/flopy/commit/088f147f1d761875f3a1ffabdda82312c002305a): Input data check for mf6 (#779). Committed by spaulins-usgs on 2020-01-16.


* Bug fixes:

* [fix(280, 835)](https://github.com/modflowpy/flopy/commit/6dae1b0ed5df6836ce6ea981de7050621a90477f): Set_all_data_external now includes constants, cellids in list data are checked (#920). Committed by spaulins-usgs on 2020-06-23.
* [fix(mfsfr2.check)](https://github.com/modflowpy/flopy/commit/796b7b15385de0181cabd33d3bc1915bfa76a83b): Negative segments for lakes no longer included in segment numbering order check (#915). Committed by aleaf on 2020-06-23.
* [fix(GridIntersect)](https://github.com/modflowpy/flopy/commit/d5672f585faa31ead48973834d9b30cf70512cba): Fixes #916 and 917 (918). Committed by Davíd Brakenhoff on 2020-06-22.
* [fix(ZoneBudget)](https://github.com/modflowpy/flopy/commit/0207372769c5389835c555820c11fc377a4370c7): Fix faulty logic in ZoneBudget (#911). Committed by Jason Bellino on 2020-06-22.
* [fix(SwtListBudget)](https://github.com/modflowpy/flopy/commit/eed5afdd03917256b097a797ec1137c2b80fb8a1): Totim was not being read correctly for seawat list file (#910). Committed by langevin-usgs on 2020-06-10.
* [fix(Seawat.modelgrid)](https://github.com/modflowpy/flopy/commit/7a31a1d7a210894d9970e2e7a3a6a6453518289b): Pass lenuni from dis file into modelgrid instance (#901). Committed by Joshua Larsen on 2020-06-02.
* [fix(mfsimulation)](https://github.com/modflowpy/flopy/commit/0958b28added4b572b168c35657f1d5fd968e952): Repair change for case insensitive model names (#897). Committed by langevin-usgs on 2020-06-01.
* [fix(_plot_util3d_helper, export_array)](https://github.com/modflowpy/flopy/commit/617b98dd0f5750c7cf4d1a9e8376e00fdb4e94bf): (#895). Committed by Joshua Larsen on 2020-06-01.
* [fix()](https://github.com/modflowpy/flopy/commit/8e70c9284490b220ef6fe759b0fafbb5d252f1ae): fix building in clean env (#894). Committed by Ritchie Vink on 2020-05-28.
* [fix(setup.py)](https://github.com/modflowpy/flopy/commit/b80a89c18821fe1bc7375c15e4c03d1e0be70916): Read package name, version, etc. from version.py (#893). Committed by Hughes, J.D on 2020-05-26.
* [fix(MFSimulation)](https://github.com/modflowpy/flopy/commit/3cec7929f323e7753ef80e95b31a64a6105dce41): Remove case sensitivity from register_ims_package() (#890). Committed by Joshua Larsen on 2020-05-25.
* [fix(modelgrid)](https://github.com/modflowpy/flopy/commit/bb861ac2f05e7e8d38a832d03ae0a45a2249d10d): Fix offset for xul and yul in read_usgs_model_reference_file and attribs_from_namfile_header (#889). Committed by Joshua Larsen on 2020-05-19.
* [fix(886)](https://github.com/modflowpy/flopy/commit/f4e5ed39c5316e9bd2b7941c31f1b91253cd51e5): Mfarray aux variable now always returned as an numpy.ndarray. fixed problem with pylistutil not fully supporting numpy.ndarray type. (#887). Committed by spaulins-usgs on 2020-05-19.
* [fix(CellBudgetFile)](https://github.com/modflowpy/flopy/commit/29d7f849f8d2f160a537494661bd096a9e1c1253): Update for auto precision with imeth = 5 or 6 (#876). Committed by Joshua Larsen on 2020-05-14.
* [fix(870)](https://github.com/modflowpy/flopy/commit/cbf1f65a8f3389f55bb55249ce8c358ac06cf75c): Update ims name file record after removing ims package (#880). Committed by Joshua Larsen on 2020-05-14.
* [fix](https://github.com/modflowpy/flopy/commit/e3a6c26fe8ad39c69cd5fec78064f12d2edbb521): #868, 874, 879 (881). Committed by spaulins-usgs on 2020-05-14.
* [fix(867)](https://github.com/modflowpy/flopy/commit/265fc7c64956b9165b9be2607680de086a9cf973): Fixed minimum record entry count for lists to never include keywords in the count (#875). Committed by spaulins-usgs on 2020-05-11.
* [fix(SfrFile)](https://github.com/modflowpy/flopy/commit/4100de2b80cdb542e820f3b41a88eaf9865fa63d): Update sfrfile for streambed elevation when present (#866). Committed by Joshua Larsen on 2020-05-04.
* [fix(831,858)](https://github.com/modflowpy/flopy/commit/a177d59c691367e568de07b340d53e8b1f2322fb): Data length check and case-insensitive lookup (#864). Committed by spaulins-usgs on 2020-05-01.
* [fix(856)](https://github.com/modflowpy/flopy/commit/c45a5e5f1fb2f8224d87307564b68dc1c30063d9): Specifying period data with value none now only removes data from that period. also, fixed an unrelated problem by updating the multi-package list. (#857). Committed by spaulins-usgs on 2020-04-22.
* [fix(plot_array)](https://github.com/modflowpy/flopy/commit/f6545ff28004f4f6573e07aab939d774230df0a6): Update plot_array method to mask using np.ma.masked_values (#851). Committed by Joshua Larsen on 2020-04-15.
* [fix(ModflowDis)](https://github.com/modflowpy/flopy/commit/52ecd98a11fc4f459c9bd0b59cb854ff402eeb08): Zero based get_node() and get_lrc()… (#847). Committed by Joshua Larsen on 2020-04-10.
* [fix(binaryfile_utils, CellbudgetFile)](https://github.com/modflowpy/flopy/commit/f514a22a38264dc81c0db6dae62db4beae8df227): Update for imeth == 6 (#823). Committed by Joshua Larsen on 2020-04-10.
* [fix(utils.gridintersect)](https://github.com/modflowpy/flopy/commit/14040ff605dfe496d8ec88ca8eeb3f73daeee06e): Bug in gridintersect for vertex grids (#845). Committed by Davíd Brakenhoff on 2020-04-06.
* [fix(mflmt.py)](https://github.com/modflowpy/flopy/commit/1f322f0ef50be9dfaa2252cacb091aded4159113): Clean up docstring for package_flows argument in lmt. Committed by emorway-usgs on 2020-03-31.
* [fix(str)](https://github.com/modflowpy/flopy/commit/59cac5c0466b497c36e833784b436d4a5e47fcd5): Add consistent fixed and free format approach (#838). Committed by Hughes, J.D on 2020-03-31.
* [fix(vtk)](https://github.com/modflowpy/flopy/commit/aa9f3148008dd4c23d86db4e4dae5bae8c8bc564): Issues related to nan and type cast. Committed by Etienne Bresciani on 2020-03-31.
* [fix(pyproj)](https://github.com/modflowpy/flopy/commit/9a1b9e344aefad4ed222bd8d10eb6b9000c9c7d0): Pyproj.proj's errcheck keyword option not reliable (#837). Committed by Mike Taves on 2020-03-29.
* [fix](https://github.com/modflowpy/flopy/commit/4bfab916592784180d57df59b78d190e28c9099b): (#830): handling 'none' cellids in sfr package (834). Committed by spaulins-usgs on 2020-03-25.
* [fix()](https://github.com/modflowpy/flopy/commit/90a498ea2356e0eca7ddbf1c89a0f5f12f14b5a3): Fix quasi3d plotting (#819). Committed by Ruben Caljé on 2020-03-02.
* [fix(ModflowSfr2.export)](https://github.com/modflowpy/flopy/commit/b6c9a3a6668ee8a35fda785da3709bd4842b7ba9): Update modflowsfr2.export() to use grid instead of spatialreference (#820). Committed by Joshua Larsen on 2020-02-28.
* [fix(flopy3_MT3DMS_examples.ipynb)](https://github.com/modflowpy/flopy/commit/65e8adaeea55a14a3d61c125801741c5b9ceb699): Wrong indices were indexed (#815). Committed by Eric Morway on 2020-02-20.
* [fix(build_exes.py)](https://github.com/modflowpy/flopy/commit/f3136a233274baa63ace7555d862c43bc67894f5): Fix bugs for windows (#810) (813). Committed by Etienne Bresciani on 2020-02-18.
* [fix(mflist)](https://github.com/modflowpy/flopy/commit/4a885a107ee5ead5a116f95bb1f7f60549cba295): Default value not working (#812). Committed by langevin-usgs on 2020-02-13.
* [fix(flopy3_MT3DMS_examples.ipynb)](https://github.com/modflowpy/flopy/commit/0d152513d4ecb84fd474cb0495dd0676f05d5b72): Match constant heads to original problem (#809). Committed by Eric Morway on 2020-02-11.
* [fix(vtk)](https://github.com/modflowpy/flopy/commit/ab8120bc3dc1214fef90077ade226471900b89d5): Change in export_cbc output file name (#795). Committed by rodrperezi on 2020-01-30.
* [fix(mf6)](https://github.com/modflowpy/flopy/commit/84ee8a72b00fbcd8e7f396af9b356170634cfda6): Update create packages to support additional models (#790). Committed by Hughes, J.D on 2020-01-24.
* [fix(remove_package)](https://github.com/modflowpy/flopy/commit/102d25b23dc0281cccf65eb0a9d3cc8b05755484): Fixed remove_package to rebuild namefile recarray correctly after removing package - issue #776 (784). Committed by spaulins-usgs on 2020-01-17.
* [fix(gridgen)](https://github.com/modflowpy/flopy/commit/061c72771ae4bc023e970bf9048a4c53bba2ba80): X, y center was not correct for rotated grids (#783). Committed by langevin-usgs on 2020-01-16.
* [fix(mtssm.py)](https://github.com/modflowpy/flopy/commit/f7886e2762464f69ae6b1e3ef1124bbee017b8a8): Handle 1st stress period with incrch equal to -1 (#780). Committed by Eric Morway on 2020-01-16.
* [fix(vtk)](https://github.com/modflowpy/flopy/commit/73f70518238ff383628ba25066c41647e875dc2e): Change in export_model when packages_names is none (#770). Committed by rodrperezi on 2019-12-30.
* [fix()](https://github.com/modflowpy/flopy/commit/ec71e6ce2d2f4bc3d05e3172cccba6c42bf26b87): fix(repeating blocks) (#771). Committed by spaulins-usgs on 2019-12-30.
* [fix(replace package)](https://github.com/modflowpy/flopy/commit/cf3586f0602acd20c9c672b2c763f09c6a252e00): When a second package of the same type is added to a model, the model now checks to see if the package type supports multiple packages. if it does not it automatically removes the first package before adding the second (#767). (768). Committed by spaulins-usgs on 2019-12-18.
* [fix(Mflist)](https://github.com/modflowpy/flopy/commit/51d80641e81f844490306d2cddefacb21bda8302): Allow none as a list entry (#765). Committed by langevin-usgs on 2019-12-16.

* **Dropped support for python 2.7**
* Switched from [pangeo binder](https://aws-uswest2-binder.pangeo.io/) binder to [mybinder.org binder](https://mybinder.org)
* Added support for MODFLOW 6 Skeletal Compaction and Subsidence (CSUB) package

* Bug fixes:

* Fix issue in MNW2 when the input file had spaced between lines in Dataset 2. [736](https://github.com/modflowpy/flopy/pull/736)
* Fix issue in MNW2 when the input file uses wellids with inconsistent cases in Dataset 2 and 4. Internally the MNW2 will convert all wellids to lower case strings. [736](https://github.com/modflowpy/flopy/pull/736)
* Fix issue with VertexGrid plotting errors, squeeze proper dimension for head output, in `PlotMapView` and `PlotCrossSection`
* Fix issue in `PlotUtilities._plot_array_helper` mask MODFLOW-6 no flow and dry cells before plotting
* Removed assumption that transient SSM data appears in the first stress period [754](https://github.com/modflowpy/flopy/issues/754) [#756](https://github.com/modflowpy/flopy/issues/754). Fix includes a new autotest ([t068_test_ssm.py](https://github.com/modflowpy/flopy/blob/develop/autotest/t068_test_ssm.py)) that adds transient concentration data after the first stress period.
* Fix issues with add_record method for MfList [758](https://github.com/modflowpy/flopy/pull/758)

**<span style="color:red" style="text-decoration:underline">Support for Python versions < 3.5 will be dropped in the next version of FloPy (version 3.3.0)</span>**

* ModflowFlwob: Variable `irefsp` is now a zero-based integer ([596](https://github.com/modflowpy/flopy/pull/596))
* ModflowFlwob: Added a load method and increased precision of `toffset` when writing to file ([598](https://github.com/modflowpy/flopy/pull/598))
* New feature GridIntersect ([610](https://github.com/modflowpy/flopy/pull/610)): The GridIntersect object allows the user to intersect shapes (Points, LineStrings and Polygons) with a MODFLOW grid. These intersections return a numpy.recarray containing the intersection information, i.e. cell IDs, lengths or areas, and a shapely representation of the intersection results. Grids can be structured or vertex grids. Two intersections methods are implemented: `"structured"` and `"strtree"`: the former accelerates intersections with structured grids. The latter is more flexible and also works for vertex grids. The GridIntersect class is available through `flopy.utils.gridintersect`. The functionality requires the Shapely module. See the [example notebook](../examples/Notebooks/flopy3_grid_intersection_demo.ipynb) for an overview of this new feature.
* New feature `Raster` ([634](https://github.com/modflowpy/flopy/pull/634)): The Raster object allows the user to load raster files (Geotiff, arc ascii, .img) and sample points, sample polygons, create cross sections, crop, and resample raster data to a Grid. Cropping has been implemented using a modified version of the ray casting algorithm for speed purposes. Resampling a raster can be performed with structured, vertex, and unstructured Grids. Rasters will return a numpy array of resampled data in the same shape as the Grid. The Raster class is available by calling `flopy.utils.Raster`. The functionality requires rasterio, affine, and scipy. See the ([example notebook](../examples/Notebooks/flopy3_raster_intersection.ipynb)) for an overview of this feature.
* Modify NAM and MFList output files to remove excessive whitespace ([622](https://github.com/modflowpy/flopy/pull/622), [#722](https://github.com/modflowpy/flopy/pull/722))
* Deprecate `crs` class from `flopy.utils.reference` in favor of `CRS` class from `flopy.export.shapefile_utils` ([608](https://github.com/modflowpy/flopy/pull/608))
* New feature in `PlotCrossSection` ([660](https://github.com/modflowpy/flopy/issues/660)). Added a `geographic_coords` parameter flag to `PlotCrossSection` which allows the user to plot cross sections with geographic coordinates on the x-axis. The default behavior is to plot distance along cross sectional line on the x-axis. See the ([example notebook](../examples/Notebooks/flopy3_PlotCrossSection_demo.ipynb)) for an overview of this feature.
* New feature with binaryfile readers, including `HeadFile` and `CellBudgetFile` ([669](https://github.com/modflowpy/flopy/pull/669)): [`with` statement](https://docs.python.org/3/reference/compound_stmts.html#with) is supported to open files for reading in a context manager, which automatically close when done or if an exception is raised.
* Improved the flopy list reader for MODFLOW stress packages (for mf2005, mfnwt, etc.), which may use SFAC to scale certain columns depending on the package. The list reading now supports reading from external files, in addition to open/close. The (binary) option is also supported for both open/close and external. This new list reader is used for reading standard stress package lists and also lists used to create parameters. The new list reader should be consistent with MODFLOW behavior.
* SfrFile detects additional columns ([708](https://github.com/modflowpy/flopy/issues/708))
* Add a `default_float_format` property to mfsfr2, which is string formatted by NumPy versions > 1.14.0, or `{:.8g}` for older NumPy versions ([710](https://github.com/modflowpy/flopy/issues/710))
* Support for pyshp 1.2.1 dropped, pyshp 2.1.0 support maintained
* Improved VTK export capabilities. Added export for VTK at array level, package level, and model level. Added binary head file export and cell by cell file export. Added the ability to export point scalars in addition to cell scalars, and added smooth surface generation. VTK export now supports writing transient data as well as exporting to binary .vtu files.
* Support for copying model and package instances with `copy.deepcopy()`
* Added link to Binder on [README](README.md) and [notebooks_examples](../examples/docs/notebook_examples.md) markdown documents. Binder provides an environment that runs and interactively serves the FloPy Jupyter notebooks.

* Bug fixes:

* When using the default `iuzfbnd=None` in the `__init__` routine of mtuzt.py, instantiation of IUZBND was generating a 3D array instead of a 2D array. Now generates a 2D array
* ModflowSfr2 `__init__` was being slowed considerably by the `ModflowSfr2.all_segments` property method. Modified the `ModflowSfr2.graph` property method that describes routing connections between segments to handle cases where segments aren't listed in stress period 0.
* Ensure disordered fields in `reach_data` (Dataset 2) can be supported in `ModflowSfr2` and written to MODFLOW SFR input files.
* When loading a MF model with UZF active, item 8 ("`[IUZROW]` `[IUZCOL]` `IFTUNIT` `[IUZOPT]`") wasn't processed correctly when a user comment appeared at the end of the line
* MODFLOW-6 DISU JA arrays are now treated as zero-based cell IDs. JA, IHC, CL12 are outputted as jagged arrays.
* Models with multiple MODFLOW-6 WEL packages now load and save correctly.
* Exporting individual array and list data to a shapefile was producing an invalid attribute error. Attribute reference has been fixed.
* Fix UnboundLocalError and typo with `flopy.export.shapefile_utils.CRS` class ([608](https://github.com/modflowpy/flopy/pull/608))
* Fix Python 2.7 issue with `flopy.export.utils.export_contourf` ([625](https://github.com/modflowpy/flopy/pull/625))
* When loading a MT3D-USGS model, keyword options (if used) were ignored ([649](https://github.com/modflowpy/flopy/pull/649))
* When loading a modflow model, spatial reference information was not being passed to the SpatialReference class ([659](https://github.com/modflowpy/flopy/issues/659))
* Fix specifysurfk option in UZF, ModflowUZF1 read and write surfk variable
* Fix minor errors in flopy gridgen wrapper
* Close opened files after loading, to reduce `ResourceWarning` messages ([673](https://github.com/modflowpy/flopy/issues/673))
* Fix bugs related to flake8's F821 "undefined name 'name'", which includes issues related to Mt3dPhc, ModflowSfr2, ModflowDe4, ListBudget, and ModflowSms ([686](https://github.com/modflowpy/flopy/issues/686))
* Fix bugs related to flake8's F811 "redefinition of unused 'name'" ([688](https://github.com/modflowpy/flopy/issues/688))
* Fix bugs related to flake8's W605 "invalid escape sequence '\s'" (or similar) ([700](https://github.com/modflowpy/flopy/issues/700))
* Fix EpsgReference class behavior with JSON user files ([702](https://github.com/modflowpy/flopy/issues/702))
* Fix ModflowSfr2 read write logic for all combinations of isfropt and icalc
* IRCH array of the Recharge Package is now a zero-based variable, which means an IRCH value of 0 corresponds to the top model layer ([715](https://github.com/modflowpy/flopy/issues/715))
* MODFLOW lists were not always read correctly if they used the SFAC or binary options or were used to define parameters ([683](https://github.com/modflowpy/flopy/issues/683))
* Changed VDF Package density limiter defaults to zero ([646](https://github.com/modflowpy/flopy/issues/646))