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Estimating the annual sediment yield of a small agricultural catchment in central Poland

机译：估算波兰中部一个小型农业流域的年沉积物产量

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摘要

The annual sediment yield of a small (91 km~2) agricultural catchment in central Poland has been estimated, based on river flow measurements and catchment characteristics, and verified by reservoir surveys. Although soil erosion rates and sediment yields in this part of Poland are generally seen as low by global standards, reservoir sedimentation is a problem and there is a need to develop and validate a method for estimating catchment sediment yields. In this investigation, the suspended sediment input to a reservoir, has been estimated using the Universal Soil Loss Equation coupled with a sediment delivery ratio (USLE-SDR). The annual bed load has been estimated based on the flow duration curve and three different bed load formulae. The reservoir surveys were carried out four times between 1980 and 2009. Between 1980 and 2009 the reservoir lost approx. 13% of its capacity. A close agreement was found between the amount of sediment deposited in the reservoir and the sediment input estimated using the USLE-SDR and the bed-load formulae.
机译：根据河流流量测量和集水特征，估算了波兰中部一个小农业集水区（91 km〜2）的年沉积物产量，并通过水库调查进行了验证。尽管按全球标准普遍认为波兰这部分地区的土壤侵蚀速率和沉积物产量较低，但水库沉积是一个问题，需要开发和验证一种估算集水区沉积物产量的方法。在这项调查中，已使用通用土壤流失方程式与沉积物输送比（USLE-SDR）估算了输入水库的悬浮沉积物。已根据流量持续时间曲线和三种不同的床荷公式估算了年度床荷。在1980年至2009年之间进行了四次储层勘测。在1980年至2009年之间，储层损失了大约20％。容量的13％。在储层中沉积的沉积物数量与使用USLE-SDR和床载量公式估算的沉积物输入量之间存在密切的一致性。

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