| 刊名 | Meteorological and Environmental Research |
| 作者 | Tianwen ZHANG1*, Wei CHEN1, Xiaoying CHEN2,3, Rongjun ZHI1, Lin2,3 CHEN, Haibo ZHANG 1, Wei LIANG1 |
| 作者单位 | 1.Ningxia Hui Autonomous Region Institute of Mineral Geology, Yinchuan 750021, China; 2. Key Laboratory of Restoration and Reconstruction of Degraded Ecosystems in Northwest China, Ministry of Education (Ningxia University), Yinchuan 750021, China; 3. College of Ecology and Environment, Ningxia University, Yinchuan 750021, China |
| DOI | 10.19547/j.issn2152-3940.2024.04.016 |
| 年份 | 2024 |
| 刊期 | 4 |
| 页码 | 58-65 |
| 关键词 | Soil type; Layer thickness; Water infiltration; Desert steppe |
| 摘要 | In order to compare the influence of different soil types and stratification on water infiltration capacity, two main types of soil in the desert steppe, sierozem (S) and aeolian sandy soil (A), were selected, and infiltration simulation tests were conducted on homogeneous soil and layered soil (layer thickness 5, 10, and 20 cm), respectively. The results showed that during the whole experiment, there was a small difference between S5A95 (aeolian sandy soil 95 cm thickness was covered with sierozem 5 cm thickness) and S10A90 (aeolian sandy soil 90 cm thickness was covered with sierozem 10 cm thickness) in the wetting front process, infiltration rate and cumulative infiltration, but there was a significant difference between S5A95 and S20A80 (aeolian sandy soil 80 cm thickness was covered with sierozem 20 cm thickness). In the initial infiltration stage, there was no significant difference between A5S95 (sierozem 95 cm thickness was covered with aeolian sandy soil 5 cm thickness) and A10S90 (sierozem 90 cm thickness was covered with aeolian sandy soil 10 cm thickness). However, with the increase of infiltration time, the wetting front process, A5S95, A10S90 and A20S80 had significant differences in terms of wetting front process, infiltration rate and cumulative infiltration. The infiltration capacity of A was significantly higher than that of S. Combined with linear R2 value and model parameters, the three infiltration models were comprehensively compared, and the fitting process and results of the general empirical model for the infiltration process of homogeneous soil and layered soil showed good results. Three models were used to simulate the water infiltration process of layered soil with different textures, and the order of the effect is as follows: general empirical model, Kostiakov model and Philip model. Soil type and layer thickness had a great influence on water infiltration process. When sierozem was covered with aeolian sandy soil 20 cm thick, the infiltration capacity was the best. As aeolian sandy soil was covered with sierozem 10 cm thick, the infiltration effect was the worst. Therefore, once coarse graying occurs on the surface of sierozem (the thickness of sand is more than 20 cm) or when the content of fine particles overlying aeolian sandy soil (the thickness of silt and clay soil is more than 10 cm) during ecological restoration is high, the soil hydrological characteristics will change significantly, which may lead to changes in vegetation types and even ecosystem structure. |
