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1 基本情况燕山水库是一座拟建的以防洪为主,结合供水、灌溉,兼顾发电等综合利用的大Ⅱ型水库,总库容约9.66亿 m~3,水库位于沙河主要支流澧河上游的干江河上,坝址在叶县境内保安乡杨湾村,控制流域面积1169km~2。燕山水库坝址以上多年平均径流量3.62亿 m~3,多年平均悬移质输沙量110万 t,推移质按悬移质的15%计列,年总输沙量为126.5万 t,其多年平均含沙量为3.5t/m~3,属于含沙量较大河流。2 淤积分布计算2.1 水库特性影响淤积分布的因素主要是来沙量、库区地形条件、水深面积关系及运用方式。沙河漯河以西已建有昭平台、白龟山和孤石滩等大型水库,有运行30年左右的实测淤积资料,这些邻近水库的地形、地貌、径流含沙等情况与燕山水库类同,库区地形各有相同之处,可用类比法推求燕山水库未来的淤积分布情况,昭平台、白龟山、燕山水库的相对特性指标如表1。
1 Basic Conditions Yanshan Reservoir is a large-scale reservoir to be built with flood control as the main function, combining with comprehensive utilization of water supply, irrigation and power generation with a total storage capacity of about 966 million m 3. The reservoir is located in the upper reaches of the main tributary of the Shahe River On the rivers, the dam site is in Yangwan Village, Baoan Township, Ye County, with a controlled drainage area of 1169km ~ 2. The annual average runoff of Yanshan Reservoir is 362 million m ~ 3. The average suspended sediment transport in the past years is 1.1 million t. The mass of displacement is calculated as 15% of the suspended mass. The total annual sediment discharge is 1.265 million tons, The average annual sediment concentration is 3.5t / m ~ 3, belonging to a large amount of sediment. 2 Silt distribution calculation 2.1 Reservoir characteristics Affect the sedimentation distribution factors are mainly sediment, the reservoir area topography, water depth and the relationship between the use of methods. West of the Luohe River in Shahe has built large reservoirs such as the Zhaoping platform, Baigui Mountain and Bashitan beaches, with actual siltation data for about 30 years. The topography, topography and runoff and sediment of these adjacent reservoirs are similar to that of the Yanshan Reservoir The terrain has its own similarities. The analogy can be used to deduce the future siltation distribution of Yanshan Reservoir. Table 1 shows the relative characteristics of Zhaoping platform, Baiguishan and Yanshan reservoirs.