基于综合治理和水文模型的广西县域石漠化小流域区划研究

以小流域为单元布置各项石漠化治理工程,是国家开展石漠化综合治理的主体内容。研究基于石漠化综合治理的理念,厘定石漠化小流域概念体系。首先,运用数字高层模型数据,在Arc GIS水文模型的支持下,划分几何小流域;在此基础上,综合考虑石漠化综合治理实践经验,结合岩溶地下流域,生成实体小流域。根据小流域的自然地理背景,对实体小流域进行聚类,得到4种小流域类型,针对每种类型分别推广适宜的石漠化治理模式;最后,根据石漠化综合治理的需要,从实体小流域中选择出少数适宜安排治理工程的治理小流域,并将结果应用于天等县和环江县等石漠化综合治理工程中。

The Regionalization of Small Watershed in Rocky Desertification Counties of Guangxi Based on Comprehensive Controls and Hydrological Model

The main content of the comprehensive control for karst rocky desertification of the state was the arrangement of the control projects in small watersheds. Based on the concept of comprehensive treatment, the conceptual system of the small watershed was figured out. First, with the support of the hydrological model in ArcGIS, the digital elevation model was processed and the geometric small watershed was divided. On this basis, the practical experience of comprehensive controls was considered and the underground karst watershed was combined to generate the entity small watershed. According to the physical geography background, the entity small watershed was clustered into four types. And the control patterns were generalized specific to each type. Finally, the small watersheds for comprehensive controls were selected from the entity small watershed according to the requirement of control projects. The results were applied in the practical control projects, such as the Tiandeng county and the Huanjiang County.