湿地和洪泛区流域划分和水平衡建模方法  

Study on watershed division and water balance modeling method of wetland and flood plain

作　　者：韩亮 Han Liang(Hebei Hengshui hydrological survey and Research Center,Hengshui,Hebei 053000,China)

机构地区：[1]河北省衡水水文勘测研究中心,河北衡水053000

出　　处：《山西水土保持科技》2022年第4期8-11,共4页Soil and Water Conservation Science and Technology in Shanxi

摘　　要：地势较低的河漫滩湿地的水平衡受到地下水和地表水相互作用的时间变化和空间范围的强烈影响。本文将引入一种稳健的算法,从而能够划定低地河流和漫滩之间的相互作用区。该相互作用区被指定为“直接集水区”,由连接的漫滩部分定义,其中湿地水平衡主要受相邻河流的地表水动力学影响。描述算法基于传递函数,传递函数由综合水平衡和养分动力学模型(Integrated Water Balance And Nutrient,IWAN)的局部模拟结果评估。传递函数由年平均地下水深度和模拟地下水动力学进一步确定。它们由地表水对地下水水位的最大横向影响程度的模拟结果控制。所开发的划定算法的区域化导致了对河流沿线地下水-地表水-相互作用过程的最大范围的规定。IWAN模型用于模拟漫滩的水平衡。模拟结果证明了河流和漫滩之间的紧密相互作用,连通漫滩对河流流量的时空变化影响仅在夏季低流量时才重要。the water balance of low-lying floodplain wetland is strongly affected by the temporal variation and spatial range of the interaction between groundwater and surface water.This paper will introduce a robust algorithm to delineate the interaction area between lowland rivers and floodplain.This interaction area is designated as"direct catchment area"and is defined by the connected floodplain part,in which the wetland water balance is mainly affected by the surface hydrodynamics of adjacent rivers.The description algorithm is based on the transfer function,which is evaluated by the local simulation results of the integrated water balance and nutrient dynamics model(iwan).The transfer function is further determined by the annual average groundwater depth and simulated groundwater dynamics.They are controlled by the simulation results of the maximum lateral impact of surface water on groundwater level.The regionalization of the developed delineation algorithm leads to the regulation of the maximum range of groundwater surface water interaction process along the river.Iwan model is used to simulate the water balance of floodplain.The simulation results prove the close interaction between river and floodplain,and the influence of connected floodplain on the temporal and spatial variation of river flow is only important when the flow is low in summer.

关 键 词：湿地 洪泛区流域划分 水平衡建模 动力学模型IWAN 

分 类 号：P641[天文地球—地质矿产勘探]