What's Changed Bugfix (science changes): Fixed Diffusive wave downstream boundary condition by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/303 Fixed default value for newFileFrequency by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/325 Upstream reach detection using goodBas (upstream reach connected with valid hru area) by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/346 detect maximum unit-hydrograph size for restart writing by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/341 Flow adjustment to ensure river volume is always positive or zero by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/348 New features: csv reading capability with new csv object by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/295 reading water take and observed flow by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/298, https://github.com/ESCOMP/mizuRoute/pull/305 capability of water abstraction/injection during routing by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/300 Add reach volume in restart state file by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/299 Separate runoff input time step and simulation time step by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/340 Direct insertion of observed discharge by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/328, https://github.com/ESCOMP/mizuRoute/pull/302 Added reach volume for history and restart files by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/347 Minor updates (cleanup, doc updates, non-science etc.): README for building instruction by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/350 minor update: readthedoc link update by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/294 Code style, variable name cleanup by @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/304 https://github.com/ESCOMP/mizuRoute/pull/342 including git information (version, branch, hash) @nmizukami in https://github.com/ESCOMP/mizuRoute/pull/352 Full Changelog: https://github.com/ESCOMP/mizuRoute/compare/v1.2.2...v1.2.3