不同精度的土壤数据对水质和水量模拟的影响

李影,雷秋良,秦丽欢,朱阿兴,李晓虹,翟丽梅,王洪媛,武淑霞,闫铁柱,李文超,胡万里,任天志,刘宏斌

Impact of Soil Data with Different Precision on Water Quality and Flow Simulation

LI Ying,LEI QiuLiang,QIN LiHuan,ZHU AXing,LI XiaoHong,ZHAI LiMei,WANG HongYuan,WU ShuXia,YAN TieZhu,LI WenChao,HU WanLi,REN TianZhi,LIU HongBin

表3 选取的水文循环参数及其初始阈值

Table 3 Hydrologic cycle parameters and their initial ranges

参数 Parameter 参数说明 Parameter description 初始阈值 Initial threshold R_CN2.mgt 水分条件Ⅱ时的初始SCS径流曲线数 Initial SCS runoff curve number for moisture condition II -1 0.5 V_ALPHA_BF.gw 基流α因子 Baseflow alpha factor 0 1 V_RCHRG_DP.gw 深层含水层的渗透系数 Deep aquifer percolation fraction 0 1 V_GW_REVAP.gw 地下水的revap系数 Groundwater “revap” coefficient 0.02 0.2 V_GW_DELAY.gw 地下水的时间延迟 Groundwater delay time 0 500 V_GWQMN.gw 发生回归流的浅层含水层的水位阈值 Threshold depth of water in the shallow aquifer required for return flow to occur 0 5000 V_SHALLST.gw 浅层含水层的初始水深 Initial depth of water in the shallow aquifer 0 50000 V_DEEPST.gw 深层含水层的初始水深 Initial depth of water in the deep aquifer 0 50000 V_SLSUBBSN.hru 平均坡长 Average slope length 10 150 V_OV_N.hru 坡面漫流的曼宁系数n值 Manning’s “n” value for overland flow 0.01 30 V_ESCO.hru 土壤蒸发补偿因子 Soil evaporation compensation factor 0.01 1 V_LAT_TTIME.hru 侧向流的运动时间 Lateral flow travel time 0 180 V_EPCO.hru 植物吸收补偿因子 Plant uptake compensation factor 0 1 V_HRU_SLP.hru 平均比降 Average slope steepness 0 1 V_CH_N2.rte 主河道的曼宁系数n值 Manning’s “n” value for the main channel -0.01 0.3 V_FFCB.bsn 初始土壤蓄水量 Initial soil water storage 0 1 V_SURLAG.bsn 地表径流滞后系数 Surface runoff lag coefficient 0.05 24