Besides, common features of GIS development related with underground pipelines is summed up, and an universal model of urban underground pipelines GIS is put forward.

并归纳总结了在与地下管线相关的GIS系统开发中的一些共同特点，提出了一个城市地下管线地理信息系统的通用技术路线。

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This essay puts forward the prevention methods for Xiufeng Park's water pollution with respect to the investigations ofthe water pollution in Xiufeng Park and also the features of the urban parks.

前言： 根据秀峰公园内秀峰湖水污染的调查结果，结合城市公园的特点提出了对该湖水污染的防治对策。

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Compared with natural soil and water loss, urban soil and water loss has the features of artificiality, complexity, seriousness and regulation.

与自然水土流失相比，城市水土流失具有人为性、复杂性、严重性和可调控性等特点。

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