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UU-Hydro / PCR-GLOBWB_model

PCR-GLOBWB (PCRaster Global Water Balance) is a large-scale hydrological model intended for global to regional studies and developed at the Department of Physical Geography, Utrecht University (Netherlands). Contact: Edwin Sutanudjaja (E.H.Sutanudjaja@uu.nl).
GNU General Public License v3.0
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report accumulated water body evaporation over all routing substeps #23

Closed BramDr closed 1 year ago

BramDr commented 1 year ago

Previously the reported water body evaporation represented only the last step of the routing (kinematic wave) substeps. Now it accurately reflects the accumulated water body evaporation over all substeps.

A small water balance test was run (1 month), as shown below. Although the water body evaporation increases, the water balance delta did not change substantially as the water body evporation flux is tiny compared to the other fluxes.

Old implementation 2023-06-15 09:14:54,474 pcrglobwb INFO The following summary is for surface water bodies. 2023-06-15 09:14:54,475 pcrglobwb INFO Delta surface water storage days 1 to 31 in 2000 = 2.489044e+02 km3 = 1.842381e+00 mm 2023-06-15 09:14:54,477 pcrglobwb INFO Accumulated waterBodyEvaporation days 1 to 31 in 2000 = 1.273404e-01 km3 = 9.425687e-04 mm 2023-06-15 09:14:54,478 pcrglobwb INFO Accumulated surfaceWaterInput days 1 to 31 in 2000 = 3.288287e+03 km3 = 2.433977e+01 mm 2023-06-15 09:14:54,479 pcrglobwb INFO Accumulated dischargeAtPitTotal days 1 to 31 in 2000 = 3.039392e+03 km3 = 2.249746e+01 mm 2023-06-15 09:14:54,479 pcrglobwb INFO Accumulated surfaceWaterBalance days 1 to 31 in 2000 = 9.420800e-03 km3 = 6.973239e-05 mm

New implementation 2023-06-15 09:14:54,474 pcrglobwb INFO The following summary is for surface water bodies. 2023-06-15 09:25:32,245 pcrglobwb INFO Delta surface water storage days 1 to 31 in 2000 = 2.489044e+02 km3 = 1.842381e+00 mm 2023-06-15 09:25:32,246 pcrglobwb INFO Accumulated waterBodyEvaporation days 1 to 31 in 2000 = 3.056061e+00 km3 = 2.262085e-02 mm 2023-06-15 09:25:32,247 pcrglobwb INFO Accumulated surfaceWaterInput days 1 to 31 in 2000 = 3.288287e+03 km3 = 2.433977e+01 mm 2023-06-15 09:25:32,249 pcrglobwb INFO Accumulated dischargeAtPitTotal days 1 to 31 in 2000 = 3.039392e+03 km3 = 2.249746e+01 mm 2023-06-15 09:25:32,249 pcrglobwb INFO Accumulated surfaceWaterBalance days 1 to 31 in 2000 = 9.420800e-03 km3 = 6.973239e-05 mm

edwinkost commented 1 year ago

@BramDr : Many thanks. I have merged your fix. Best, Edwin