论文部分内容阅读
【研究目的】应用SOTER数据库与RUSLE模型定量化估算河北省土壤侵蚀风险。【方法】在建立河北省SOTER数据库的基础上,提取地形因子、植被覆盖与耕作管理措施和土壤保持措施,结合土壤可蚀性与降雨侵蚀力因子,应用RUSLE模型定量评价河北省山区土壤侵蚀风险。【结果】河北省轻度水土流失面积3.5万km2,占18.9%;中度水土流失面积1.1万km2,占6.1%;强度与极强度水土流失面积分别为8 183km2与1.0万km2,分别占全省面积的4.4%和5.6%;剧烈土壤侵蚀面积为1.2万km2,占全省面积的6.8%。【结论】河北省土壤侵蚀主要发生在太行山、燕山山区,尤以低山丘陵地带的土石山区最为严重。
【Purpose】 The SOTER database and RUSLE model were used to quantitatively estimate the soil erosion risk in Hebei Province. 【Method】 On the basis of establishing SOTER database in Hebei province, the topographic factors, vegetation coverage and tillage management measures and soil conservation measures were extracted. Based on the soil erodibility and rainfall erosivity, the RUSLE model was used to quantitatively evaluate the risk of soil erosion in mountainous areas of Hebei Province. . 【Result】 The results showed that the area of mild soil erosion in Hebei Province was 35,000 km2, accounting for 18.9% of the total. Soil erosion area was 11,000 km2, accounting for 6.1%. The area of soil erosion with intensity and extreme intensity was 8 183 km2 and 10 000 km2 respectively The province’s area of 4.4% and 5.6%; violent soil erosion area of 12000 km2, accounting for 6.8% of the province’s area. 【Conclusion】 The soil erosion in Hebei Province mainly occurs in the Taihang Mountains and Yanshan Mountains, especially in the mountainous areas of the mountainous areas.