A combined temperature and water content model for bare soil

遥感信息 Pub Date : 1997-08-03 DOI:10.1109/IGARSS.1997.609168

J. Kjellgren

引用次数: 1

Abstract

The authors have developed a combined temperature and water content model for bare soil in one spatial dimension (depth) and time. The main purpose of the model is the study of the surface temperature variations due to a number of environmental parameters. In addition the authors also study the water content of the soil due to the great influence of evaporation. They characterize the soil by the thermodynamic and water tension properties. Experimental data have been used to support the model development. The core of the model is two coupled differential equations, one describing the temperature and the heat flow of the soil and one handling the water fraction and the soil water flow. The thermodynamic parameters of the heat flow depend on the water content. At the soil surface they model the heat exchange due to solar radiation, the thermal radiation exchange between the soil and the sky, the heat exchange due to air (and rain) convection and the exchange of sensible heat (mainly evaporation). They suppose no heat flow through the bottom surface.

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裸土温度-含水量组合模型

建立了裸土在一个空间维度(深度)和时间上的温度和含水量组合模型。该模型的主要目的是研究由于一些环境参数引起的地表温度变化。此外，作者还研究了由于蒸发量影响较大的土壤含水量。它们通过热力学和水张力特性来表征土壤。实验数据已被用来支持模型的发展。该模型的核心是两个耦合的微分方程，一个描述土壤的温度和热流，一个处理含水率和土壤水流量。热流的热力学参数取决于水的含量。在土壤表面，他们模拟了太阳辐射引起的热交换、土壤与天空之间的热辐射交换、空气(和雨)对流引起的热交换以及感热(主要是蒸发)交换。他们假设底部表面没有热流。

本文章由计算机程序翻译，如有差异，请以英文原文为准。

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遥感信息

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