摘要
通常用以某试验区实验数据为基础建立的纯经验土壤流失预报方程来计算土壤流失量。这种方程的建立必须有长期、系统的土壤侵蚀观测数据。笔者提出一种基于不同时相实测数据建立交互数字高程模型研究坡面土壤沉积与搬运间的量化关系的方法,进而获得小流域坡面不同时相间的土壤侵蚀量。利用GPS数据进行宏观控制分析,全站仪坐标测量功能精确实测的大比例尺数字化地形图,通过GIS进行空间数据处理与研究成果的三维显示,较好地计算特定地理单元的土壤侵蚀量。
Calculoution of soil erosion amount is limited by experimental data of long term and larg area, i.e., it is needed to collect lots of data. Using alternant DEM, the study raised a new method based on the relation of sedimentation and precipitation to acquire the amount of soil erosion on hillslopes. The control surveying is achieved by GPS, and the large-scale Digital Terrain Map is achieved by Total Station. The experiment indicates that this method not only represents the three-dimention research results but also manage the spacial data by GIS, and the amount of soil erosion in special geographical cell can be calculated and forecasted.
出处
《中国水土保持科学》
CSCD
2003年第3期63-66,共4页
Science of Soil and Water Conservation
