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A Two-parameter Exponential Recession Model for Simulating Cropland Soil Moisture Dynamics

SHANG Songhao MAO Xiaomin

SHANG Songhao, MAO Xiaomin. A Two-parameter Exponential Recession Model for Simulating Cropland Soil Moisture Dynamics[J]. 中国地理科学, 2014, (5): 575-586. doi: 10.1007/s11769-014-0676-3
引用本文: SHANG Songhao, MAO Xiaomin. A Two-parameter Exponential Recession Model for Simulating Cropland Soil Moisture Dynamics[J]. 中国地理科学, 2014, (5): 575-586. doi: 10.1007/s11769-014-0676-3
SHANG Songhao, MAO Xiaomin. A Two-parameter Exponential Recession Model for Simulating Cropland Soil Moisture Dynamics[J]. Chinese Geographical Science, 2014, (5): 575-586. doi: 10.1007/s11769-014-0676-3
Citation: SHANG Songhao, MAO Xiaomin. A Two-parameter Exponential Recession Model for Simulating Cropland Soil Moisture Dynamics[J]. Chinese Geographical Science, 2014, (5): 575-586. doi: 10.1007/s11769-014-0676-3

A Two-parameter Exponential Recession Model for Simulating Cropland Soil Moisture Dynamics

doi: 10.1007/s11769-014-0676-3
基金项目: Under the auspices of National Natural Science Foundation of China (No. 51279077, 91125017)
详细信息
    通讯作者:

    SHANG Songhao

A Two-parameter Exponential Recession Model for Simulating Cropland Soil Moisture Dynamics

Funds: Under the auspices of National Natural Science Foundation of China (No. 51279077, 91125017)
More Information
    Corresponding author: SHANG Songhao
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出版历程
  • 收稿日期:  2012-12-21
  • 修回日期:  2013-02-28
  • 刊出日期:  2014-07-27

A Two-parameter Exponential Recession Model for Simulating Cropland Soil Moisture Dynamics

doi: 10.1007/s11769-014-0676-3
    基金项目:  Under the auspices of National Natural Science Foundation of China (No. 51279077, 91125017)
    通讯作者: SHANG Songhao

摘要: To simulate the soil moisture variation in cropland, a two-parameter exponential recession model was derived to depict the recession process of soil moisture in the root zone. The model is based on the assumption that the recession rate of soil water is proportional to the potential evapotranspiration rate and the difference of soil water content and steady soil water content. Two parameters in this model are soil texture-dependent recession constant and steady soil water content. The model was calibrated and validated with measured soil water data at two experiment sites in North China with different soil textures and cropping systems. Coefficients of determination between measured and model simulated soil water content were all greater than 0.7, indicating that both models gave satisfactory simulation results. Results showed that values of two parameters mentioned above are both larger for finer soil than those for coarser soil. At the same potential evapotranspiration rate and soil water content, the recession rate of finer soil is usually lower than that of coarser soil. The proposed model can be used in irrigation management to predict approximate date for irrigation, as well as be embedded into watershed hydrological models to estimate the antecedent precipitation index.

English Abstract

SHANG Songhao, MAO Xiaomin. A Two-parameter Exponential Recession Model for Simulating Cropland Soil Moisture Dynamics[J]. 中国地理科学, 2014, (5): 575-586. doi: 10.1007/s11769-014-0676-3
引用本文: SHANG Songhao, MAO Xiaomin. A Two-parameter Exponential Recession Model for Simulating Cropland Soil Moisture Dynamics[J]. 中国地理科学, 2014, (5): 575-586. doi: 10.1007/s11769-014-0676-3
SHANG Songhao, MAO Xiaomin. A Two-parameter Exponential Recession Model for Simulating Cropland Soil Moisture Dynamics[J]. Chinese Geographical Science, 2014, (5): 575-586. doi: 10.1007/s11769-014-0676-3
Citation: SHANG Songhao, MAO Xiaomin. A Two-parameter Exponential Recession Model for Simulating Cropland Soil Moisture Dynamics[J]. Chinese Geographical Science, 2014, (5): 575-586. doi: 10.1007/s11769-014-0676-3
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