黄河背河洼地农田生态的遥感分析
AGRO-ECOLOGICAL ANALYSIS OF THE LOW-LYING LAND ALONG THE YELLOW RIVER BACK BY ROMOTE SENSING
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摘要: 本文运用彩色红外影象分析和野外实地调查相结合的方法,重点分析了黄河背河洼地的农田生态特点和治理措施。结果表明:1.本区以高湿和重盐碱化为突出特点,而黄河河水的侧渗补给和土壤质地轻是两个基本原因。背河洼地的宽度(y)与临背河高差(x1)和主流内边缘距大堤的距离(x2)的回归方程为:y=0.49x1—0.46x2+0.1(x1>0;x2>0);2.“引黄灌淤—水旱轮作”农田生态系统为本区的适宜模式;3.运用彩色红外影象的色调标志与纹理标志,并结合对耕作制度、土壤和其它地理相关标志的影象解译,可以对本区各种改造利用类型及其适宜程度进行分析。Abstract: In this paper, the agro-ecological characteristics and ameliorating measures of the low-lying land along the Yellow River back have been analysed by interpretation of aerial color infrared image and On-site investigation. The results showed;1. The ecological characteristics of this area Were highly moist and salt-affected. Side permeability of the water of Yellow River and light texture of the soil account for these characteristics. A regression model of the width of the land (Y ) , the height difference between the front and back sides (X1 ) and the distance of the main stream to the embankment(X2)waS formed: Y=0.49X1-0.46X2+0.1 (X1 >0,X2>0).2. The agro-ecological system of "improving the soil with silt and Water from the Yellow River-dry and wet rotation of the farmland" should be the suitable pattern of that area.3. The verious types of land Utilization and the degree of suitability in that district could be analyzed by intepretation of aerial color infrared image and the symbol of its veins combined with the cropping system, types of soil and other related subjects.