永丰县上保水库溢洪道采用异型进口的效益

本溢洪道设计采用了异型进口水力设计的科研成果，与常规设计相比，这种溢洪道具有进口布置灵活，增加堰长，减小单宽溢流量，降低堰上溢流水头等特点，上保水库溢洪道由于采用了异型进口，在不断加工程投资和最高库水位不变的条件下，使堰顶高程提高1．39m，增加有效库容、灌溉面积分别为27．8％和27．7％，经济效益显著，由此可见，溢洪道异型进口确实是一项值得推广的工程实用技术。

Benefits of the Spillway With a Special tgpe lntake on Shangbao Reservoir in Yongbeng County

We use the scientific research result on the hydracilic design of special type intake in designing Shangbao Reservoir spillway. Comparing with general design, spillways of this type hase many advantages, such as flexibly selecting the entrance zone, inereasing the length of the weir crent, decreasing the discharge passing through a unit width, reducing the water depth on the weir crest. Because a spillway of this type has been applied to Shangbao Reservoir, the weir crest rises 1.39m the effective storage and the the irrigation area inerease correspondingly 27.8% and 27.7%. Under the conditon of no inereasing the project inrestment and no changing the reservoir highest water level, Its economic benefit is obviously great. Therefore, spillways with special type intakes are really Worth of being popularized in engineering.