以WEP为基础的寒区田间水循环模拟分析——以青冈县为例

Simulation Analysis of Field Water Circulation in Cold Region Based on WEP ---Take Qinggang County as an Example

水循环系统是自然界最重要的物质循环之一,构建区域水循环系统是合理调配水资源的重要方法。黑龙江省是我国重要的粮食生产地区,随着我国新一轮振兴东北计划的实行,对于地区水资源的保障提出了更高的要求。文中使用WEP模型软件对黑龙江省青冈县进行自然水循环的模拟分析,使用2018-2022年的逐月统计数据建立模型,对建立后的模型进行验证分析,结果显示水资源总量5年内增加了8.83%,农田土壤的最大冻结深度降低了29%;土壤的含水量同比增加了6.8%,地下水总量保持稳定,2021和2022年的地下水受降雨的影响减小。综上,该地区水资源总量相对稳定,土壤冻结深度对于土壤含水量影响较大,随着冻结层厚度的减少,土壤含水量随之增加,土壤含水层厚度增加,导致地表水受降水量的影响效果降低,使地下水含量变得稳定。

Water circulation system is one of the most important material circulation in nature,and the construction of regional water circulation system is an important way to rationally allocate water resources.Heilongjiang province is an important grain production area in China.With the implementation of a new round of revitalization plan in Northeast China,higher requirements are put forward for the protection of regional water resources.In this paper,WEP model software was used to simulate and analyze the natural water cycle in Qinggang County,Heilongjiang province.Monthly statistical data from 2018 to 2022 were used to establish a model,and the established model was verified and analyzed.The results showed that the total water resources increased by 8.83%in five years,and the maximum freezing depth of farmland soil decreased by 29%.The water content of the soil increased by 6.8%year on year,the total groundwater remained stable,and the groundwater in 2021 and 2022 was less affected by rainfall.The results showed that the total water resources in this area were relatively stable,and the freezing depth of soil had a great influence on the soil water content.As the thickness of the frozen layer decreased,the soil water content increased,and the thickness of the soil aquifer increased.As a result,the influence of the surface water on precipitation decreased,and the groundwater content became stable.