Sensitivity of recharge estimation to the pore connectivity parameter of vadose zone rocks
https://doi.org/10.33623/0579-9406-2020-1-81-87
Abstract
Information on recharge value is necessary for solving different classes of hydrogeological problems. One of the methods of recharge estimation is simulation of flow in vadose zone. Soil hydraulic parameters are used to estimate recharge by flow in vadose zone. One of the hydraulic parameters is the pore connectivity parameter l. The sensitivity of estimated recharge to the value of pore connectivity parameter, especially under humid climate conditions, is studied insufficiently. In present study, the experimental values of soil hydraulic parameters of samples from two different sites with various landscape conditions and vadose zone structure (forest landscape on sand and field landscape on loam) were used to estimate recharge.Recharge estimation was also carried for the value of l=0,5 and for reported values of l parameter for certain type of sediment. Analysis of calculation results demonstrated that using fixed value of l=0,5 leads to significant overestimation of calculated recharge both for forest and filed landscapes, which emphasizes the importance of experimental definitions of soil hydraulic parameters for recharge estimation. The analysis of the water balance components showed that the increase of estimated recharge with enhancement of l value is mainly associatedwith the decrease of evaporation from the upper soil layer.
About the Authors
E. A. Dedulina
Lomonosov Moscow State University
Russian Federation
119991, GSP-1, Leninskiye Gory, 1
Russian Federation
119991, GSP-1, Leninskiye Gory, 1
P. Yu. Vasilevskiy
Lomonosov Moscow State University
Russian Federation
119991, GSP-1, Leninskiye Gory, 1
Russian Federation
119991, GSP-1, Leninskiye Gory, 1
S. P. Pozdniakov
Lomonosov Moscow State University
Russian Federation
119991, GSP-1, Leninskiye Gory, 1
Russian Federation
119991, GSP-1, Leninskiye Gory, 1
References
1. Гриневский С.О., Поздняков С.П. Принципы региональной оценки инфильтрационного питания подземных вод на основе геогидрологических моделей // Водные ресурсы. 2010. Т. 37, № 5. С. 543–557.
2. Смагин А.В., Садовникова Н.В., Мизури Маауиа Бен Али. Определение основной гидрофизической характеристики почв методом центрифугирования // Почвоведение. 1998. № 11. С. 1362–1370.
3. Шеин Е.В. Курс физики почв: Учебник. М.: Изд-во Моск. ун-та, 2005. 432 с.
4. Mualem Y. A new model for predicting the hydraulic conductivity of unsaturated porous media // Water Resour. Res. 1976. Vol. 12, N 3. P. 513–522.
5. Schaap M.G. Rosetta: A computer program for estimating soil hydraulic parameters with hierarchical pedotransfer functions. University of Arizona, 2002.
6. Schaap M.G., Feike J.L. Improved prediction of unsaturated hydraulic conductivity with the Mualem–Van Genuchten Model // Soil Sci. Soc. Amer. J. 2000. Vol. 64. P. 843–851.
7. Seboong Oh., Yun K.K., Jun-Woo K. A modified Van Genuchten–Mualem model of hydraulic conductivity in korean residual soils // Water J. 2015. Vol. 7. P. 5487–5502.
8. Simunek J.M., Sejna H.S., Sakai M., Van Genuchten M.T. Hydrus-1D manual version 4.17. Depart. of environ. sci., California, Riverside, University of California. 2013.
9. Van Genuchten M.T., Leij F.J., Yates S.R. The RETC code for quantifying the hydraulic functions of unsaturated soils. Riverside: U.S. Department of Agriculture, 1991.
10. Wang T., Zlotnik V.A., Šimůnek J., Schaap M.G. Using pedotransfer functions in vadose zone models for estimating groundwater recharge in semiarid regions // Water Resour. Res. 2009. Vol. 45. Doi 10.1029/2008WR006903.
11. Wosten J.H., Van Genuchten M.T. Using texture and other soil propertiesto predict the unsaturated soil hydraulic functions // Soil Sci. Soc. Amer. J. 1988. Vol. 52. P. 1762–1770.
12. Yoshiki S., Kazunobu T., Masato K. et al. Evaluation of the tortuosity parameter for forest soils to predict unsaturated hydraulic conductivity // J. For. Res. 2001. Vol. 6. P. 221–225.
Review
For citations:
Dedulina E.A., Vasilevskiy P.Yu., Pozdniakov S.P. Sensitivity of recharge estimation to the pore connectivity parameter of vadose zone rocks. Moscow University Bulletin. Series 4. Geology. 2020;(1):81-87. (In Russ.) https://doi.org/10.33623/0579-9406-2020-1-81-87
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