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以重庆市两江新区中嘴河流域为例,通过实地调研,借助GIS技术、ERDAS平台等,定量分析了城市新区不同开发阶段地块的土壤流失量,并据此提出城市水土保持建议。研究表明:城市开发过程中不同阶段水土流失问题的严重性排序为土地平整阶段>主体施工阶段>未开发阶段>建设完成阶段;开发建设导致土壤侵蚀模数、土壤流失量、侵蚀强度比例发生明显变化;土地平整阶段地块的剧烈侵蚀面积仅次于微度侵蚀,但其产生的土壤流失量最大。
Taking Zhongzhong River Basin in Liangjiang New District of Chongqing Municipality as an example, this paper quantitatively analyzes the amount of soil loss in different development stages of urban area through GIS, ERDAS platform and so on, and puts forward urban water and soil conservation suggestions accordingly. The results show that the seriousness of soil erosion at different stages in the process of urban development is ranked as follows: land leveling stage> main construction stage> undeveloped stage> completion stage of construction; obvious proportion of soil erosion modulus, soil loss and erosion intensity occurred during development and construction The area of severe erosion in the land leveling stage is second only to the micro-erosion, but it has the largest amount of soil loss.