黄河三角洲清水沟流路水面宽度与单宽流量的时空变化

Temporal and Spatial Variation of the Width of Water Surface and the Unit Width of River Flow in the Yellow River Delta Qing Shuigou Flow

河流水面宽度与单宽流量,是重要的水力学和沉积动力学参数;遥感技术为获取这些参数并研究其变化提供了重要的技术手段。本文以黄河三角洲河道为例,利用Landsat影像和GIS技术,结合利津站的逐日流量资料,分析了清水沟流路1976—2005年期间河道水面宽度与单宽流量的变化。研究结果显示,从空间上看,黄河三角洲河道水面宽度及其变幅由利津站向下游方向逐渐变大,而单宽流量及其变幅由利津站向下游方向逐渐变小;从时间上看,利津站下游水面宽度随时间有逐渐变小的趋势,而单宽流量随时间有逐渐变大的趋势。本文的结果可为黄河三角洲水力学与沉积动力学研究提供水面宽度与单宽流量参数,同时为黄河三角洲的治理提供参考。

The width of water surface and the unit width of river flow is an important parameter for hydraulics and sediment dynamics.Remote sensing technology provides an important technical mean to get these parameters and make research on their changes.In this paper,we take the river channel of Yellow River Delta as an example and use Landsat images and GIS technology,by combining the daily flow data in Lijin Station and analyzing the changes of the width of water surface and the unit width of river flow in Qingshuigou Road from 1976 to 2005.The research results show that,the width of river surface and its rangeability of the river channel of Yellow River Delta has amplitude by Lijin station to the downstream direction from the perspective of space,but the unit width of river flow has reduced from Lijin station to the downstream direction gradually.The width of surface in the downstream of Lijin station gradually has reduced with the development of time,but the unit width of river flow has decreased from the perspective of time.The results of this paper provide the width of water surface and the unit width of river flow parameters for the study of hydraulics and sediment dynamics in the Yellow River Delta,meanwhile it also provides a reference for the management of the Yellow River delta.