一、問題的提出在应用区域洪水預报的时候,最大的一个困难是:許多中小型水庫缺乏水位～庫容曲綫;因此,水庫現蓄多少水量,尚能安全容蓄多少水量,无法确定。这种情况給水庫的安全和經济运轉,带来了許多困难。如果沒有現成的比較精确的大比例尺庫区地形图,而且进行庫区地形測量(包括水上和水下部分)又 I. PROBLEM PROPOSALS One of the biggest difficulties when applying regional flood forecasting is that many small and medium-sized reservoirs lack a water level-storage capacity curve; therefore, how much water the reservoir can store and how much water it can safely contain can not be determined. This situation has caused many difficulties for the safe and economical operation of the reservoir. If there is no ready-made more accurate large-scale topographic map of the reservoir area, and the reservoir topography (including water and underwater parts) and