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首页> 外文会议>Biennial ISEM Conference on Ecological Modelling for Global Change and Coupled Human and Natural System >Impact of Baojixia water diversion works on the hydrologic regime in the Wei River basin
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Impact of Baojixia water diversion works on the hydrologic regime in the Wei River basin

机译：宝鸡夏水转移作品对魏河流域水文制度的影响

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Baojixia water diversion works have direct impacts on river hydrology, primarily resulting in the changes of the magnitude, frequency of low and high flows, ultimately generating a new hydrologic regime differing significantly from the natural flow regime. Streamflow and precipitation data from 1944 to 2008 at Linjiacun station are analyzed in this study. In order to evaluate hydrologic alteration before and after water diversion, the Range of Variability Approach (RVA) is used in this paper, and hydrologic data was divided into two periods: before and after 1972, when Baojixia diversion works brought to service in the Wei River. It is supposed that the hydrologic time series before 1972 represents the hydrologic regime for the pre-irnpact period, and that after 1972 for the post-impact period. The Chi-square test is used to analyze the hydrologic alteration of monthly flows, which is classified as low, middle and high hydrologic alterations. Flow Duration Curve (FDC) representing the relationship between the magnitude and frequency of streamflow was used to investigate flow characteristics from low flow to high flow. FDC is categorized as three parts on the basis of magnitude of streamflow: high flow (below 10% of exceedance frequency), low flow (over 90% of exceedance frequency) and constant flow (from 10% to 90% of exceedance frequency). The results show that the magnitude of monthly flow decreased obviously in the post-impact period, especially in dry seasons. The degree of hydrologic alteration is high. The shape of FDC in the post-impact period is different from that in the pre-impact period. There is an obvious trend for FDC in the pre-impact period, while there is no obvious regularity between magnitude of streamflow and exceedance probability in the post-impact period. According to the analysis on the data of water diversion, water withdrawn accounted for about 80 percent of natural runoff in dry seasons. This may be the reason why the alteration of monthly flow in dry seasons is highest. In summary, monthly streamflow after 1972 changed greatly because of water diversion. This analysis makes one to understand hydrologic regime well, and will be helpful for the management of water resources in the Wei River basin.
机译：宝吉霞的进水工程对河流水文产生了直接影响，主要导致幅度，频率低，高流量的变化，最终从自然流动方案产生了显着不同的新水文制度。在本研究中分析了1944年至2008年的Stream流和降水数据。在这项研究中分析了Linjiacun站。为了评估进水前后的水文改变，本文使用了可变性方法（RVA）的范围，水文数据分为两个时期：1972年之前和之后，当BAOJIXIA转移作品带入魏晋河。假设1972年之前的水文时间序列代表了前虹膜前期的水文制度，并且在1972年后发生了后冲击期。 Chi-Square测试用于分析月度流动的水文改变，该流量被归类为低，中和高水文改变。流动持续时间曲线（FDC）表示流流量的幅度和频率之间的关系，用于研究从低流量到高流量的流动特性。 FDC基于流流量的大小分类为三个部分：高流量（低于超过频率的10％），低流量（超过频率的90％）和恒定流量（超过频率的10％至90％）。结果表明，在后冲击期后，每月流量的大小明显下降，特别是在干燥季节。水文改变程度高。后冲击期间FDC的形状与预冲击期的不同之处不同。 FDC在预冲击期中存在明显的趋势，而流出的幅度之间没有明显的规律性，并且在后冲击期后的概率。根据分析进出口分析，水中的水占干季节的约80％的天然径流。这可能是为什么在干燥季节中每月流动的改变最高。总之，1972年之后的月度流流程大大改变了由于进水。这种分析使人们更加了解水文制度，并将有助于魏河流域水资源的管理。

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