基于“3S”技术的退牧还草工程效益监测

Benefit Monitoring of Ceasing Herding Engineering Based on 3S Technology

以若尔盖县2003~2010年实施的退牧还草工程为例,应用3S (GIS、RS、GPS)技术为主要手段,结合长期地面固定监测点定位监测与路线调查,通过遥感影像与地面调查数据的相关性,建立监测模型,对工程完成情况、地上生物量、植被盖度、植被高度、优良牧草比例、地下有机质、土壤NPK含量等指标进行了测算和分析,对工程实施效益进行了评价。

Taking the ceasing herding engineering in Ruoergai county from 2003 to 2010 as an example, the application of 3S (GIS, RS, GPS) technology as the main means, combined with long-term fixed location monitoring of ground with route survey, through the correlation of remote sensing image with ground survey data, monitoring model is established. The completion of the project, the ground biomass, vegetation coverage, vegetation height, the ratio of good quality forage, underground indices such as organic matter, soil NPK content are calculated and analyzed. The authors made an evaluation of the project benefit.