Study on the Design and Matching of the Measures for Karst Rocky Desertification Control in Small Catchment Scale

Abstract

The Renjiang River Catchment in Zunyi City, Guizhou Province of China was selected as the study area to research how to design and match the measures for rocky desertification control and ecosystem restoration. SPOT satellite image (resolution 2.5m), the topographic maps (1:10000), regionalism Map (1:50000), hydrogeological map were used to research under the 3S-Technology (GPS, RS, GIS) and software including ArcView, ArcGIS and Erdas. Many times of field survey and discussions with the local people and government were also carried out. Conclusions were drawn that: the design and match of the measures for the Renjiang River Catchment is scientific and rational; land use conditions, rocky desertification grades, land suitability assessment and prediction of the cultivated land demanded are very important for the design and matching of the measures for the rocky desertification control; a comprehensive idea for each small catchement how to select and design individual measure and how to match the measures together to achieve the best effect of rocky desertification control is also important. Finally, suggestions are given for the karst rocky desertification areas that land use conditions, rocky desertification grades, land suitability assessment and prediction of the cultivated land demanded should be fully considered in the process of designing and matching the measures; the land use should be matched with the rocky desertification and should support the scale of measured designed; measures can be implemented only when these measures do not threat the basic cultivated land demand; the land suitability should also support the area of the measures designed.