摘要
介绍了^(137)Cs方法测算土壤侵蚀量的基本原理。研制了适合复杂岩性侵蚀区使用的^(137)Cs侵蚀模型。并以鄂东花岗片麻岩侵蚀区的某荒坡小流域为例,计算了其坡面土壤侵蚀量和侵蚀模数,计算结果与径流场实测结果十分接近。此外,还对该流域坡面土壤侵蚀的分选性做了初步评价。
In the paper, a fundamental principle for using the radionuclide cesium-137 as a tracer to estimate soil erosion is introduced and 137Cs erosion model suitable for complicated lithological soil erosion area is developed. Case study is made in a non-agricultural small watershed in the granitic gneiss erosion area of the eastern Hubei Province. The Erosion amount and the modulus of erosion of the watershed calculated by the model are very close to those determined by the runoff experimental fields. A preliminary evaluation is also made on the particle selectivity during erosion of sloping fields.
出处
《长江科学院院报》
CSCD
北大核心
1993年第4期56-63,共8页
Journal of Changjiang River Scientific Research Institute
基金
长江科学院基金资助项目
关键词
小流域
土壤侵蚀
同位数示踪法
Cesium-137
small watershed
soil erosion
modulus of erosion
particle selectivity during erosion
