Through the investigation on climate, geological condition and human activity of Yongding River Basin, the origin of wind-sandy land in Yongding River Basin was analyzed.
通过对北京市永定河流域气候、地质条件及人为活动的调查，分析了永定河流域风沙化土地的成因。
Erosion characteristics of two kinds of typical aeolian soils in Horqin Sandy Land were studied using portable wind tunnel.
通过风洞实验，研究了科尔沁沙地两种典型风沙土的风蚀特征。
Based on field investigation, tests, and indoor wind tunnel experiment, the mechanism of soil erosion by wind on sandy land is analyzed.
通过典型样地调查和室内风洞试验，分析了该区沙地土壤风蚀机理。
The relation of wind velocity and total amount of sand transport also changes with vegetation coverage: On shifting sandy land, wind velocity has a cubic function to the sand transport;
随着植被盖度的变化，风速与输沙率的关系也发生变化：流动沙地上风速与输沙率呈三次函数关系；
The relation of wind velocity and total amount of sand transport also changes with vegetation coverage: On shifting sandy land, wind velocity has a cubic function to the sand transport;
随着植被盖度的变化，风速与输沙率的关系也发生变化：流动沙地上风速与输沙率呈三次函数关系；
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