青海省公路桥涵水文分区技术探讨

Hydrological partitioning technology of highway bridges and culverts in Qinghai province

青海省内缺少公路桥涵水文分区图,给公路桥涵建设带来不便。为取得具体明确的分区范围图,在深入研究省内河川径流特征和水文站分布的基础上,按照二级分区原则,以水系流域等定性指标进行一级分区,对黄河上游区、湟水大通河区进行模糊聚类分析研究,对水文站布置偏少的玉树区、柴达木区、青海湖区、祁连山区进行定性论证,将全省原有的6个分区,重新划分为7个产流区和1个非产流区,并得到具体的二级分区图。经新、旧分区公式的误差对比计算,新分区计算精度高于旧分区,可以指导全省公路桥涵建设。

Lack of highway bridges and culverts hydrological zoning map of Qinghai Province leads to inconvenience in highway construction. In order to obtain specific and clear partition range maps, based on research in runoff characteristics, distribution of the hydrological stations and the principle of two partitions, fuzzy clustering analysis work are completed for upper Yellow River area and Huangshui Datong River area. For the area with few hydrological station like Yushu area, Qaidam region, Qinghai Lake and Qilian areas, qualitative descriptions are demonstrated. The existing six partitions are re-divided into seven runoff area and a non-runoff area, and a secondary partition map is obtained. Error comparative analysis indicates the new partition flow formula accuracy is higher than the old partition, which can ~uide the orovince＇ s hi^hwav hrid^e ~nn.~truotlcm