Document Type : Research Paper
Authors
- Mohammadreza Fazel Pouraghdaei 1
- Hossein Malekinezhad 2
- Mohammadreza Ekhtesasi 3
- Jalal Barkhordari 4
1 PhD student, Faculty of Natural Resources and Desert Studies, Yazd University, Iran
2 Associate Professor, Faculty of Natural Resources and Desert Studies, Yazd University, Iran
3 Professor, Faculty of Natural Resources and Desert Studies, Yazd University, Iran
4 Scientific Board, Yazd Agricultural and Natural Resources Research and Education Center, AREEO, Yazd, Iran
Abstract
The main objective of water spreading projects is recharging aquifers. In this study, changes of soil surface permeability in Yazd water spreading projects, including Sirizi in Bafgh, Herat and Miankouh in Mehriz were investigated. Using a double ring, 12 Permeability tests (in first and fourth strips and three tests for each strip) were performed. Using measured data the performance of permeability equations such as Kostiakov, Kostiakov-Lewis, Horton, SCS, and Philip were compared in estimating cumulative infiltration and infiltration rate in the study areas. Results showed that average permeability for Bafgh, Herat and Mehriz water spreading projects were about 1.06, 1.52 and 2.94 cmhr-1, respectively. The best equation for estimating cumulative infiltration in Bafgh was the Horton equation with RMSE and Nash Sutcliffe coefficients of 0.097 and 0.992, respectively, while in Herat and Mehriz the best equation was the Kostiakov-Lewis equation with Nash-Sutcliffe coefficient and RMSE of 0.385, 0.994, 0.081 and 0.991 respectively.
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