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在实测淤地坝资料的基础上,结合过去的研究成果,分析了无定河流域坝地淤积形态及其有关拦泥参数。认为影响坝地淤积形态的因素复杂,其中原沟底比降和坝前淤厚是两个重要因素;实测结果表明,坝地“翘尾巴”现象虽远不如水库明显,但均为斜淤积,直接拦泥效益比设计平库容要大,不过数值不大,平均斜淤积量占总淤积量的12.1％;同时,分析计算出截止到1989年底每亩坝地拦沙量为3900t/亩。
On the basis of the data of silting dam and the past research results, the silting patterns of silt dam in Wudinghe River Basin are analyzed. It is considered that the factors influencing the siltation pattern of the dam are complex. Among them, the ratio of the original ditch and the siltation before the dam are two important factors. The measured results show that the “tail-tail” phenomenon in the dam is far less than that of the reservoir, However, the numerical value is not large and the average amount of oblique siltation accounts for 12.1% of the total amount of siltation. Meanwhile, by the end of 1989, it has been calculated and calculated that the silt restrain volume per acre dam is 3900t / mu.