Application of Remote Sensing Technology to investigate the Grassland Resources on Zhenglan Country, Inner Mongolia
Su He, Ren Zhibi
Grassland Research Institute of Chinese
Academy of Agricultural Science
Hohhot, China
Abstract
It is an advanced and economical way that using Landsat Imagery to investigate large area of grassland resources in Inner Mongolian grassland region. The result of Remote Sensing technique applied in investigating grassland resources can provide scientific basis for classification and utilization of grassland resources. This paper discusses the visual interpretation technique of landsat imagery on grassland resources investigation and mapping skills.
On the basis of qualitative study, quantitative analysis and according to relevant rules of grassland classification, the grassland resources in research area were classified into six classes, and the characteristic of each class and its image feature was mentioned in the paper.
Introduction
This study or Remote Sensing technique on investigation of grassland resources has been carried on Xilingole grassland area of Inner Mongolia, and taken the Landsat imagery on Gu Yuan sheet as the center, mapping of grassland resources with visual interpretation and qualitative study, qualitative analysis were carried out on Zhenglan County, Inner Mongolia.
Site Description
Zhenglan County is situated in southern part of Xilingole League (115002’-116041’E, 41056’-430 11’N), and it belongs to the part of inner Mongolian Plateau. The altitute rages from 1200 to 1500 meters. Zhenglan County has an area of 10.3 thousand of square kilometers, in which, natural grassland accounts for 84% of total land area.
Climatic features of the County are dry and cold. It has an average annual precipitation of 300-350 mm, an annual temperature range from 00C to 150C, the frost free period is about 100 days.
Owing to he combined effects of geographical and climatic factors, the zonal vegetation of the County is dry steppe and the zonal soil types are light chestnut and chestnut soils. However, restricted deeply by its located condition (to the south of Hun Shan Da Ko Desert), there is a chain of undulating sand dunces in the north, and the fixed and semi-fixed sandy dry steppes are distributed broadly in the district. In the south of the County, hilly-dry steppes are appeared widely, the azonal vegetation, it is meadow and marshland meadow develops.
