| Effects of biological soil crusts on soil water storage capability and permeability in loess area |
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| DOI：10.7606/j.issn.1000-7601.2009.04.11 |
| Key Words: biological soil crust water storage capacity infiltration rate infiltration model |
| Author Name | Affiliation | | WANG Cuiping | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | LIAO Chaoying | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China | | SUN Changzhong | Experimental Center of Forestry in North China, Chinese Academy of Forestry, Beijing 102300, China | | TIAN Xiaoxiong | UMPR Xi'an Planning Design & Research Institute, YRCC, MWR, Xi'an, Shaanxi 710021, China | | LV Jianliang | College of Resources and Environment, Northwest A & F University, Yangling, Shaanxi 712100, China |
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| Abstract: |
| Method of double-rings was employed to study the characteristics of soil water storage capacity and permeability of three types of biological soil crust (moss-algal crust, algal crust and thin-layer algal crust) on the loess area of Pianguan, Shanxi Province. The results showed that water storage capacity of different crust types is influenced by the thickness of biological soil crust and soil porosity, the water storage capacity was from 502.69～525.80 t/hm2 and the non-capillary water capacity was from 169.71～198.29 t/hm2 with in 10mm soil depth of the three crust types. The soil initial permeability was from 5.19～11.10 mm/min, the no crust soil had the highest velocity and the moss-algal crust soil had the lowest velocity. The solid permeability rate was from 1.67～2.67 mm/min. By using the Horton seepage model, the fitted value was close to measured value and the range of determination coefficient was 0.98～0.99. Therefore, the Horton seepage model was applied to describe the soil infiltration characters whic
h covered with biological soil crust in experimental region. |
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