基于遥感数据的叶尔羌河流域水文过程模拟与分析

发布时间：2018-04-29 09:02

本文选题：水文模型 + 水文过程　；参考：《地理科学进展》2017年06期

【摘要】：在西北荒漠-绿洲生态系统中,山区水循环对下游水资源管理具有重要作用。为了准确地理解高寒山区水文过程,以降水、温度和潜在蒸散发的遥感数据为模型输入,建立叶尔羌河流域的MIKE SHE模型。根据模型输出,从径流、积雪和蒸散发三方面探讨了流域的水文过程。结果表明:经校正后的遥感产品在叶尔羌河流域的水文模拟中取得了良好的应用效果,出山口卡群站日径流的效率系数达0.71,相关系数达0.85。河道的年平均径流深为146.66 mm,其中稳定的基流补给占21.3%。流域的年平均降雪231 mm,占总降水的74%左右;73.9%的融雪发生在7-9月,积雪主要分布于5000 m以上区域。蒸散发以7-9月中低山区植被覆盖良好的针叶林和草地为主。选用合适的方法对遥感数据进行验证和率定,有助于提高对资料缺失的高寒山区流域水文过程的认识。对不同水文要素进行分析验证,可更准确地理解水资源的转化、储存方式及其时空分布,以便为下游水资源管理提供依据。
[Abstract]:In the desert-oasis ecosystem of northwest China, the mountain water cycle plays an important role in the downstream water resources management. In order to accurately understand the hydrological process in alpine mountainous areas, the MIKE SHE model of the Yerqiang River Basin was established by using remote sensing data of precipitation, temperature and potential evapotranspiration as input. According to the model output, the hydrological process of the watershed is discussed from three aspects: runoff, snow cover and evapotranspiration. The results show that the corrected remote sensing products have been applied to the hydrological simulation of the Yerqiang River basin. The efficiency coefficient of daily runoff and the correlation coefficient are 0.71 and 0.85 respectively. The average annual runoff depth of the river is 146.66 mm, of which the steady basic flow recharge accounts for 21.3 mm. The average annual snowfall in the basin is 231mm, accounting for 74% of the total precipitation, and 73.9% of the melting snow occurred in July-September. The snow cover is mainly distributed in the area above 5000 m. The main evapotranspiration was coniferous forest and grassland with good vegetation cover in middle and low mountainous area in July-September. It is helpful to improve the understanding of the hydrological process in the alpine mountainous area where the data is missing by selecting the appropriate method to verify and determine the remote sensing data. Through the analysis and verification of different hydrological elements, the conversion, storage mode and space-time distribution of water resources can be understood more accurately, so as to provide the basis for the management of downstream water resources.
【作者单位】：荒漠与绿洲生态国家重点实验室中国科学院新疆生态与地理研究所;中国科学院大学;
【基金】：青年千人计划——新疆项目(374231001) 中国科学院特色研究所计划项目(Y674122) 国家自然科学基金(41301039,U1503183)~~
【分类号】：P333;TP79

【相似文献】