摘要： 研究了基于组件式GIS 的小流域水土保持信息系统的设计与实现；讨论了GIS 在水土保持中的应用、小流域水土保持信息系统的系统架构设计、系统功能设计与数据库设计；以六道沟小流域为例，利用组件式GIS 平台ArcGIS Engine 构建了基于GIS 的小流域水土保持信息系统。该系统充分利用了GIS 强大的空间分析、直观的信息表达功能和数据存储、处理功能，并能够采集、表达和输出小流域水土保持各类数据，利用地图、文字、表格、影像等多种手段进行信息表达，并提供了与空间分析和土壤流失计算模型集成的接口。

关键词: 小流域；水土保持信息系统；组件式技术；GIS；ArcGIS engine

Abstract: This paper discusses how to design and establish soil and water conservation information system for small watersheds based on component GIS technology. It discusses combination modes of GIS and soil and water conservation, the design of framework, functions and database of the system. It also establishes the system using Delphi and ArcGIS engine with a case of Liudaogou small watershed in the loess Plateau as an example. This GIS system can input, manage and output spatial data and attribute data about soil and water conservation of small watershed and provide interesting information with texts, tables, maps, aerial photo and other formats.

Key words: Small watershed; Soil and water conservation information system; Component technology; GIS; ArcGIS engine