| Title: | Estimation of soil cracking and the effect on surface runoff in a Texas Blackland Prairie watershed |
| Authors: | Arnold, J.G., K.N. Potter, K.W. King and P.M. Allen |
| Year: | 2005 |
| Journal: | Hydrological Processes |
| Volume (Issue): | 19(3) |
| Pages: | 589-603 |
| Article ID: | |
| DOI: | 10.1002/hyp.5609 |
| URL (non-DOI journals): | |
| Model: | SWAT (modified) |
| Broad Application Category: | hydrologic only |
| Primary Application Category: | preferential or crack flow, or other recharge method |
| Secondary Application Category: | hydrologic assessment |
| Watershed Description: | 53.4 ha USDA-ARS Y-2 located near Riesal, Texas. |
| Calibration Summary: | |
| Validation Summary: | crack flow r2 = 0.84 surface runoff r2 = 0.87 |
| General Comments: | A crack flow volume model was developed for the study that determines crack flow volumes as a function of crack potential, soil depth, and soil moisture. The model was able to capture the effects of winter soil swelling phenomena and 1998 fall recharge events, that resulted in a large reduction in crack flow volume (from 70 to 10 mm). Model comparisons performed versus measured crack flows & surface runoff. Includes graphical comparisons. |
| Language: | English |
| Keywords: | crack measurement; hydrologic model; vertisols; shrinking/swelling soils |