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Improvement of Runoff Simulation of the Amur River

机译:阿穆尔河径流模拟的改进

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Recent studies show that dissolved iron is a factor essential to the biological productivity of the Sea of Okhotsk. It is also highly probable that wetlands in the Amur River basin play an important role in providing dissolved iron to the Sea of Okhotsk. During the last century, large areas of wetlands within the Amur River catchment have been cultivated, which, in turn, may have had a great impact on the production of dissolved iron. To assess the impact of this conversion of land cover on the production of dissolved iron - and thereby primary production in the Sea of Okhotsk - we have been constructed a numerical model to simulate dissolved iron production and transport in the Amur River. Though the accuracy of hydrological models heavily depends upon the precipitation input, there has been no observation-based gridded precipitation dataset covering a continental-scale region with high spatio-temporal resolution. Recently, however, datasets such as APHRODITE have been released. Thus, in this article we evaluate how hydrological simulation results may be improved by these datasets. By comparing the results from the APHRODITE precipitation dataset with those from the NCEP2 precipitation dataset, we show that the precipitation amount from NCEP2 around the Amur River basin is overestimated. Moreover, the closeness of the fit evaluated by the Nash-Sutcliffe criteria indicates that the results from APHRODITE are significantly better than those from NCEP2. The results indicate that the precipitation of the APHRODITE dataset for the Amur River basin has good accuracy.
机译:最近的研究表明,溶解的铁是鄂霍次克海生物生产力必不可少的因素。阿穆尔河流域的湿地也很有可能在向鄂霍次克海提供溶解铁方面起重要作用。在上个世纪中,在阿穆尔河流域内已开发了大片湿地,这反过来可能对溶解铁的生产产生了很大影响。为了评估这种土地覆盖转换对溶解铁的生产(进而影响鄂霍次克海的初级生产)的影响,我们建立了一个数值模型来模拟阿穆尔河中溶解铁的生产和运输。尽管水文模型的准确性在很大程度上取决于降水输入,但是还没有基于观测的网格化降水数据集覆盖具有高时空分辨率的大陆规模区域。但是,最近已经发布了诸如APHRODITE之类的数据集。因此,在本文中,我们评估了这些数据集如何改善水文模拟结果。通过比较APHRODITE降水数据集和NCEP2降水数据集的结果,我们发现阿穆尔河流域周围NCEP2的降水量被高估了。此外,由Nash-Sutcliffe标准评估的拟合紧密度表明,APHRODITE的结果明显优于NCEP2的结果。结果表明,阿穆尔河流域APHRODITE数据集的降水具有良好的准确性。

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