丹江口水库浸没区判别方法及浸没程度评价

丹江口水库大坝加高后，其正常蓄水位附近分布的Ⅱ级阶地及其他平缓地段存在浸没问题，给当地农作物及建筑物带来危害。以浸没区基本特征为判断依据，在对水库浸没区进行初步判别和复判后，根据测区水文地质条件确定了产生浸没的临界地下水位，针对不同的地层结构确定了地下回水位的预测原则，并对浸没程度进行分级。选取典型浸没区进行了浸没评价，提出对浸没轻微地区采取排水减压措施，对浸没中等地区采取排水减压与改换农作物品种等措施，对浸没严重地区可采用彻底、可靠的压渗填高复垦方案，以降低浸没的影响。

Judgment method and inundation degree evaluation for inundation area of Danjiangkou Reservoir

Taking the characteristics of inundation area of Danjiangkou Reservoir as judgment basis,we perform re-judgment for the inundation area after preliminary judgment.The critical groundwater level depth is decided by hydrological geological condition in the measured area,the prediction principles of backed-up groundwater level are determined according to structures of different strata,and the inundation degrees is classified.Typical inundation area is selected,and we also propose some measures to reduce the in...