内蒙古达里诺尔地区草场产草量的遥感估算与监测

ESTIMATING GRASS PRODUCTION AND DYNAMIC MONITORY FOR GRASSLAND RESOURCES OF DALI-NOR AREA IN INNER MONGOLIA

本文介绍用陆地卫星 TM 资料作达里诺尔地区草场牧草产量分级图及两年产草量变化分级图的原理与方法。用84年和86年牧草生长季节的 TM 资料分别获得两年产量分级图,其产量等级与实况数据相符。产草量分级图不仅反映当年产草量的分布,也反映草场退化、沙化等实况。用这二年资料作的产草量差值分级图,则反映牧草产量的动态变化。以上分级图可用于草场资源的动态监测。

This report describes the principles and methods for grass production classification and yearly variation using LANDSAT TM data.Two grass production classification images and yearly vari- ation image of grass production were obtained with image processing system by TM images of Dali-nor area in 1984 and 1986 during the season when grasses were growing vigorously. Results show that the grass production classification level is conformable to ground truth. This classification not only indicates the production level distribution of grassland,but also the degradation and desertification of grassland,The variation of grass production classification image reflects the dynamics of grassland in 1984 and 1986.It can bc used in dynamic monitoring for grassland resources.