| Title: | Subwatershed spatial analysis tool: Discretization of a distributed hydrologic model by statistical criteria |
| Authors: | Haverkamp, S., R. Srinivasan, H.-G. Frede and C. Santhi |
| Year: | 2002 |
| Journal: | Journal of the American Water Resources Association |
| Volume (Issue): | 38(6) |
| Pages: | 1723-1733 |
| Article ID: | |
| DOI: | 10.1111/j.1752-1688.2002.tb04377.x |
| URL (non-DOI journals): | |
| Model: | SWAT |
| Broad Application Category: | hydrologic only |
| Primary Application Category: | HRU, subbasin, grid and/or landscape unit delineation effects |
| Secondary Application Category: | calibration, sensitivity, and/or uncertainty analysis |
| Watershed Description: | 6.3 km^2 Weiherbach and 81.7 km^2 Dietzhölze rivers, both located in Germany, and 4,297 km^2 Bosque River that is located in central Texas, U.S. |
| Calibration Summary: | |
| Validation Summary: | Daily? 5-year E value ranges dominant approach vs. HRU approach: Dietzhölze: .64-.73 (dom.) vs. .77-.78 (HRU) Weiherbach: -4.59-.51 (dom.) vs. .22-.35 (HRU) Bosque: .04-.39 (dom.) vs. .43-.49 (HRU) |
| General Comments: | SUSAT was developed to determine the objective choice of watershed discretizations. SUSAT was used with SWAT to find appropriate HRU and/or subwatershed subdivisions for three watersheds. The predicted streamflows were sensitive to discretization levels, especially when dominant land use and soil types were used for each watershed. The statistical evaluations are reported for using dominant land use (dom.) with no HRUs in a subwatershed versus using HRUs (HRU). |
| Language: | English |
| Keywords: | watershed modeling; geographic information system; data preprocessing; spatial discretization; heterogeneity; entropy |