1993年汛期黄河下游河势遥感调查

利用ＭＥＲＩＤＩＡＮ遥感图象处理系统，通过ＴＭ图象最佳波段组合、线性拉伸放大、密度分割等处理手段，首次在黄河上进行了卫星遥感河势调查，其优势在于：（１）可以弥补目估河势的不足；（２）能够对河势流路、主流线位置、洪漫滩范围及水边线、生产堤、主要滩区洪水进出口门位置、进水和水围村庄等准确定位；（３）可以详细计算各类滩区面积与分布密度。

Remote sesing Investigation on River Regime of the Lower Yellow River in Flood Season in 1993

Satellite remote sensing investigation on river regime was conducted at first in the Yellow River by using MERIDIAN remote sensing image processing system and with combination of the best wave bands, linear stretchment and enlargement density cut of TM images.The superorities of this method were as follow:(1)counter-acting the weakness of visual estimation of river regime;(2)exactly determining the flow route of river regime,position of main flow route,range of floodplain, mark of floodwater, productive embankment,position of flood ertry & exit of main floodplain, flood-entered & -surrounded villages etc.;(3)calculating area of all kinds of floodplain and its distribution density in detail.