Development of ecological information system of returning farmland for conservation in middle and lower reaches of Shiyang River Basin

The area of Liangzhou County and Minqin County which located at middle and lower reaches of Shiyang River Basin is one of the areas with the most severe water shortage and ecological crisis in China. The program of returning farmland for conservation is widely recognized as a critical harnessing measure to recover local ecological environment. Nevertheless, high dispersion and large quantity of cropland in this area bring about enormous difficulty to the management of returning farmland for conservation. It is urgent to develop an efficient and prompt ecological information management system. In this study, the ecological information statistical search system of returning land for maintenance was constructed, using field survey data as basic database, and Resource-2 satellite images as additional calibration with secondary ArcGIS reconstruction technique and through combing MO2.4 module and VB6.0 language. Through loading field data of 2 190 fields, it could serve to promptly search and effectively manage the sizes and characters of returning lands for ecological restoration at different spatial scales, according to different administrative units and different years. And it also could function to efficiently monitor and manage the areas properties (reporting area, re-farming area and measuring area) temporarily and spatially. This system could provide efficient ecological information platform and technique bolster for future timing dynamic management practice in this region.