基于"3S"技术的甘肃省甘州区草地资源调查与评价

以陆地卫星的TM影像为数据源,充分利用遥感信息(RS)、地理信息系统(GIS)和全球定位系统(GPS)的一体化集成技术,结合典型区调查和路线调查资料,进行了以荒漠草地为主的甘州区天然草原草地类型划分、植被指数提取、草地产草量估产模型构建及生产力评价。将甘州区天然草地划分为5个草地类(8个亚类)、10个草地组、11个草地型,确定了甘州区天然草地面积和理论载畜量,并对其生产力及利用现状进行了评价,为甘州区草地资源的合理规划、保护、建设和利用提供了依据。

INVESTIGATION AND EVALUATION OF PASTURE RESOURCES IN GANZHOU DISTRICT OF GANSU PROVINCE BASED ON '3S' TECHNOLOGY

Taking the TM video of earth satellite as data resources,this paper fully utilizes the integrative technology of RS,GIS and GPS,combines the investigation datum from typical regions and routes,and conducts partition of nature pasture type of Ganzhou District which gives priority to sandy pasture,picks up vegetation data,establishes grass production assessing model and evaluates pasture productivity.This paper divides the nature pasture in Ganzhou District into 5 types(8 sub-types),10 pasture groups an 11 pasture types,confirms the areas of natural pasture and theoretical animal holding quantity in Ganzhou District.It also evaluates the pasture productivity and utilization status,thus provides rational planning,protection,construction and utilization for pasture resources in Ganzhou District.