针对滏阳河流域断流河道生态修复的问题,为了实现断流河道尽可能恢复有水时间并且恢复基本生态功能的 目标,基于节水措施和调水工程现状,通过建立滏阳河流域SWAT(soil and water assessment tool)水文模型,在模型中设置不同补水水量、补水方式的生态补水情景,分析不同情景下断流河道断面的径流量变化和恢复有水天数,并结合生态流量评价标准评价不同情景的河流生态恢复效果.结果表明:滏阳河流域邯郸断面在节水情景和调水情景中恢复河流生态效果较好,在通过上游节水措施和补充年调水1.00×108 m3/a的情景下,可以达到5-10月恢复有水184 d、恢复径流量3 486.7 × 104 m3/a的目标;年内恢复径流峰值在8月中旬,并且河道年均径流量可以恢复到"好"等级的生态流量标准.滏阳河下游邢台断面在节水情景和调水情景下恢复径流量较少,河道有水天数不达标,需要在上游节水条件下补充外来调水水量1.50× 108 m3/a来达到恢复年有水天数304 d、恢复径流量1 906.5 × 104 m3/a的 目标,年内恢复径流峰值分别在3月中旬和8月中旬;并且在达到恢复有水目标的情景下邢台断面仅达到"一般"等级的生态流量标准,需要考虑增加调水水量进行分时段单点位补水的补水方案.
Study on Water Restoration in the Dried-up River of the Fuyang River Basin Based on the SWAT Model
In order to achieve the goal of restoring water to the river as long as possible and to restore the basic ecological functions,a SWAT(soil and water assessment tool)hydrological model for the Fuyang River basin was established based on the current status of water conservation measures and water transfer projects.The different ecological water replenishment scenarios were designed,the variation of runoff volume and the restoration of the annual number of days with water were analyzed for different scenarios.Ecological restoration effects were analyzed based on the ecological base flow standard.The results show that the river ecological restoration effect is better in the water conservation scenario and the water transfer scenario in the Handan section of Fuyang River basin,and 184 days of water restoration from May to October can be achieved through the upstream water conservation measures and the scenario of 1.00 X 108 m3/a of supplemental annual water transfer,and the restored runoff volume of 3 486.7×104 m3/a,the water replenishment can reach the ecological baseflow standard and guarantee the basic ecological function of the river.The Xingtai section in the lower reaches of Fuyang River has less restored runoff under water-saving and water transfer scenarios,so the number of days with water in the river does not meet the standard,and it needs to supplement the external water transfer volume of 1.50 × 108 m3/a under the upstream water conservation condition to achieve the restoration of the annual number of days with water is 304 days and the restored runoff volume of 1 906.5 × 104 m3/a,and Xingtai section under the scenario of achieving the target of restoring water.The ecological replenishment scheme of increasing water transfer for single point replenishment in different periods needs to be considered as it cannot reach the ecological base flow standard of the river.
SWAT modelecological water replenishmentwater restorationscenario analysisFuyang River basin
万方数据
维普
