Abstract: Soil and water loss of city includes soil loss and water loss. With the short of water resource more and more serious, as do soil loss, water loss of city also affects the development of city. Soil and water loss of city occurs not only on the earth surface, but also under the ground. The type of soil and water loss is diverse. At the same time, the characters of city soil and water loss are different in different regions.

Key words: city soil and water loss, water loss, tri-dimensional system, region different characters

摘要： 城市水土流失包括土的流失和水的流失。在水资源日益短缺的今天，城市水资源的流失与土壤资源的流失一样，严重影响着城市的发展，但在水土流失研究中对水资源的流失相对重视不够，将水土流失中水土的交互作用作为一个系统工程进行研究的工作则更少。城市水土流失不仅发生在地表，也发生在地表以下，共同构成城市水土流失的立体系统。同时，城市水土流失在区域上也具有一定的分异特征。

关键词: 城市水土流失, 水资源流失, 立体系统, 区域分异特征