地理学报 ›› 1993, Vol. 60 ›› Issue (5): 457-467.doi: 10.11821/xb199305009

• 论文 • 上一篇    下一篇

阿克苏地区陆面蒸发的数值研究

沈卫明, 姚德良, 李家春   

  1. 中国科学院力学研究所,北京 210008
  • 出版日期:1993-09-15 发布日期:1993-09-15
  • 基金资助:
    国家自然科学基金;中科院资环局资助项目

NUMERICAL STUDY ON EVAPORATION OF LAND SURFACE IN AKSUO REGION

Sheng Weaning, Yao Deliang, Li Jiachun   

  1. Institute of Mechanics CAS, Beijing 100080
  • Online:1993-09-15 Published:1993-09-15

摘要: 本文的试验地区——塔里木盆地阿克苏地区气候干旱,雨量稀少。本文详细地介绍了在土壤湿润不足情况下蒸发的计算方法,但由于人工灌溉的原因使试验地区的地下水位上升到1.5m至2m,故对小麦地的蒸散研究,找们不能完全采用干旱情况下的蒸发公式来处理,本文采用大气湍流边界层阻力的空气动力学方法来计算,并通过与波文比方法的比较,给出了小麦地总蒸散的时变化状况。同时利用土壤分层模式,给出了土壤表层与深层的体积含水量的模拟结果,并与实测值进行了比较,发现二者是基本一致的。

关键词: 陆面蒸发, 空气动力学, 分层模式, 数值模拟

Abstract: The study carries out a numerical simulation of land evaporation in arsuo region. Because the region is extremely dry with limited rainfall, the paper introduces in detail the computation mel:hod for evaporation under the condition of shortage of water. Because of artificid irrigation by Xu.jiang Geographical Institute,the underground water level is raised to 1. 5一2. 0m. In order to study the evaporation in wheat fields,we do not adopt completely computational formulae of eva- poration under the condition of drought. Because climate changes are very abnormal,the author adopts aerodynamics method with the resistances in turbulent ABL to carry out numerical simula- tiori. The vegetation in the model is wheat,and the soil is sandy loam. The date is 15一23, June,1992. The soil suface is covered with wheat completely,therefore the model do not consider the condition of bared soils. The author gives the hourly change trend of the field evapo- transpiration by the comparison with measured data. The author studies the heat transport of the soil,emphasizes particularly on the temperature change between soil and the vezetation layer .and deals with the radiation balance.

Key words: Land evaporation, Aerodynamics, Stratification model, Numerical Simu-lation