融雪水入渗规律分析及模拟

Analysis and simulation of infiltration law of snowmelt water

为了掌握融雪水的入渗规律,本文以黑龙江省伊春市带岭区为试验区,通过试验数据分析了融雪期融雪水的入渗过程和土壤累积入渗量随入渗时间的变化规律,利用模型对入渗率与时间进行模拟。结果表明:大气温度对土壤表层湿度影响较大,对下层土壤影响较小。融雪初期冰层对融雪水入渗起到一定的阻碍作用,随着温度的升高引起累积入渗量的增加。乘幂回归对入渗率的模拟精度最高,确定性系数达0.97以上,且乘幂回归的形式符合Kostiakov下渗公式。

In order to grasp the infiltration law of snowmelt water,this paper takes the belt area of Yichun City in Heilongjiang Province as the experimental area,and analyzes the infiltration process of snowmelt snowmelt during the snowmelt period and the variation of soil cumulative infiltration with the infiltration time.The model was used to simulate the infiltration rate and time.The results show that the atmospheric temperature has a great influence on soil surface humidity and a small influence on lower soil.The ice at the initial stage of melting snow has a certain obstructive effect on the infiltration of melting water.As the temperature increases,the cumulative infiltration increases.Power regression has the highest accuracy in the simulation of infiltration rate,with a deterministic coefficient of more than 0.97,and the form of power regression conforms to Kostiakov infiltration formula.