Modelling the regulation effects of lowland polder with pumping station on hydrological processes and phosphorus loads.
Modelling the regulation effects of lowland polder with pumping station on hydrological processes and phosphorus loads.
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DOI：
10.1016/j.scitotenv.2018.04.389
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发表时间：
2018-10
期刊：
影响因子：
--
通讯作者：
Renhua Yan;Lingling Li;Junfeng Gao
中科院分区：
文献类型：
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作者：
Renhua Yan;Lingling Li;Junfeng Gao
探索低地围塘的水文调节对于增加对与低地泵站相关的围塘作用的了解是至关重要的。本研究以建卫滩地为例，应用低洼滩地水文与磷模拟系统(PHPS)，定量研究了低洼滩地抽水对流量和磷负荷的调节作用。结果表明，滩涂对流域径流量的时间分布和年径流量有显著影响。与没有抽水的情况相比，有抽水站的农用地产生的流量过程线更尖锐，峰值更高，最小值更低，年平均流量减少8.6%。由于沟渠和池塘分布广泛，水力坡度较低，池塘对地表水的滞留时间增加，向下游水体输出的磷也减少了5.33hm2/ /年。
Exploring the hydrological regulation of a lowland polder is essential for increasing knowledge regarding the role of polders associated with pumping stations in lowlands. In this study, the Lowland Polder Hydrology and Phosphorus modelling System (PHPS) was applied to the Jianwei polder as a case study for quantifying the regulation effects of a lowland polder with pumping on discharge and phosphorus loads. The results indicate that the polder significantly affected the temporal distribution and annual amount of catchment discharge. Compared with a no-pumping scenario, an agricultural polder with pumping stations generated a sharper discharge hydrograph with higher peak-values and lower minimum-values, as well as an 8.6% reduction in average annual discharge. It also decreased the phosphorus export to downstream water bodies by 5.33 kg/hm2/yr because of widespread ditches and ponds, a lower hydraulic gradient, and increased retention times of surface water in ponds.