| 裸地蒸发过程的数值模拟 |
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| 引用本文： | 杨邦杰,曾德超,唐登银,谢贤群.裸地蒸发过程的数值模拟[J].地理学报,1988(4). |
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| 作者姓名： | 杨邦杰 曾德超 唐登银 谢贤群 |
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| 作者单位： | 中国科学院生态环境研究中心系统生态室
(杨邦杰)，北京农业工程大学
(曾德超)，中国科学院地理研究所
(唐登银)，中国科学院地理研究所(谢贤群) |
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| 摘 要： | 本文以能量平衡为基础,研究了裸地蒸发过程,并提出一个用Fonran语言编写的,在IBM-PC微机上通过的裸地蒸发过程的模拟程序。这一程序能根据地表红外温度或辐射资料计算裸地蒸发量,并分析能量分配过程与土壤中的含水量、温度分布。初步的田间试验说明,计算值与实测值是比较一致的。
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| 关 键 词： | 裸地 蒸发 模拟 |
THE NUMERICAL SIMULATION OF EVAPORATION PROCESS OF THE BARE SOIL |
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| Yang Bangjie Zeng Dechao.THE NUMERICAL SIMULATION OF EVAPORATION PROCESS OF THE BARE SOIL[J].Acta Geographica Sinica,1988(4). |
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| Authors: | Yang Bangjie Zeng Dechao |
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| Institution: | Yang Bangjie Zeng Dechao
(Beijing Agricultural Engineering University)
Tang Dengyin Xie Xianqun
(Institute of Geography Chinese Academy of Sciences) |
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| Abstract: | A numerical simulation model is presented for the evaporation process of bare soil in this paper, and a personnal computer program written in FORTRAN is developed and verified with preliminary field tests.
1. The entry of soil surface temperature from infrared thermometer measurements make;; the calculation of bare soil Evaporation simple and accurate. However the evaporation estimation would be erroneous if soil surface temperature was measured from glass mercury thermometer readings.
2. The algorithm of soil surface temperature from routine meteorological data is based on the energy balance equation. An algorithm program for stable solution is presented. The evaporation estimation would be acceptable as long as the algorithm of soil surface temperature is reasonable.
3. The Element Water Balance Method is used to establish the differential framework of water flow equation for unsaturated soils. Not only this method can handle the difficulties of boundary condition in the conventional differential method, but it easily treats the evaporation and infiltration in heterogeneous soils; therefore the merit:; of both differential method and finite element method are combined into t'.i.: Element Water Balance Method.
4. Based on the data of infrared therme neter measurements or radiation, the simulation prcgram of this paper can be used to calculate the evaporation rate and accumulative evaporation of bare soil, the energy compound partition, the moisture and temperature profile in soil. Also it can simulate the effects of meteorological factors and soil physics parameters on the bare soil evaporation process. The FORTRAN is used to write ' the program for a IBM-PC personal computer, so it is easy to extend it.
5. The field experiments indicate that the simulation results of evaporation rate are agreeable with the measurements by lysimeter, consequently cur program and algorithm seem to be applicable. |
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| Keywords: | Bare soil: Evaporation Simulation |
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