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丹江口水利枢纽明年将修建第二期高围堰。围堰高度为30—40公尺;建成后将形成约20余亿公方的水库。因此,围堰设计高程的决定,取决于洪水调蓄计算,由于汉江洪水流量巨大,“动水库容”将占总库容的较大部份,故调蓄计算应当考虑到这一因素进行。这一类计算,目前尚未见到完整文献。同志们在工作中按照水量平衡原理,提出了变动回水未端的演算方法。演算中考虑到未修建围堰修建围堰前的河槽(?)量,修建围堰后的水库库容,以及导流部份的水位～泄量关系曲线,求出围堰最高水位。经将
Danjiangkou water control next year will build a second high cofferdam. Cofferdam height of 30-40 meters; after the completion of the formation of about 20 billion square reservoir. Therefore, the design of the cofferdam depends on the calculation of flood regulation and storage. Due to the huge flood flow in the Han River, “moving reservoir” will account for the larger part of the total storage capacity. Therefore, the calculation of storage should take this factor into account. This type of calculation, the full literature has not yet been seen. Comrades in accordance with the principle of water balance in the work, put forward the end of the calculation method of change back to the water. The calculation takes into account the river channel (?) Before cofferdam construction cofferdam, the reservoir capacity after cofferdam construction, and the water level-discharge relation curve of the diversion part, and calculates the highest cofferdam level. After will