DYNAMIC FORECASTINGMODELS OF SOIL MOISTURE IN WINTER WHEAT AND SOYBEAN FIELDS IN SHALLOW GROUNDWATER LEVEL

Mao Fei; Zhang Jiahua; Lu Zhiguang; Jin Zhiqing

Vol.14, NO.4, 2003

Article Contents

Article Navigation > Journal of Applied Meteorological Science > 2003 > 14(4): 479-486

Mao Fei, Zhang Jiahua, Lu Zhiguang, et al. Dynamic forecasting models of soil moisture in winter wheat and soybean fields in shallow groundwater level. J Appl Meteor Sci, 2003, 14(4): 479-486.

Citation:

Mao Fei, Zhang Jiahua, Lu Zhiguang, et al. Dynamic forecasting models of soil moisture in winter wheat and soybean fields in shallow groundwater level. J Appl Meteor Sci, 2003, 14(4): 479-486.

Mao Fei, Zhang Jiahua, Lu Zhiguang, et al. Dynamic forecasting models of soil moisture in winter wheat and soybean fields in shallow groundwater level. J Appl Meteor Sci, 2003, 14(4): 479-486.

Citation:

Mao Fei, Zhang Jiahua, Lu Zhiguang, et al. Dynamic forecasting models of soil moisture in winter wheat and soybean fields in shallow groundwater level. J Appl Meteor Sci, 2003, 14(4): 479-486.

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DYNAMIC FORECASTINGMODELS OF SOIL MOISTURE IN WINTER WHEAT AND SOYBEAN FIELDS IN SHALLOW GROUNDWATER LEVEL

1.
Chinese Academy of Meteorological Sciences, Beijing 100081
2.
Chinese Agricultural University, Beijing 100094
3.
Jiangsu Academy of Agricultural Sciences, Nanjing 210014

Received Date: 2003-04-06
Rev Recd Date: 2003-05-30
Publish Date: 2003-08-31

Abstract

Abstract

The calculating model of phreatic water evaporation in the Jianghuai region is given by means of statistic and water balance methods. According to the water balance principles of crop fields, the dynamic forecasting models of soil moisture in winter wheat and soybean fields with phreatic water evaporation and without phreatic water evaporation are built. The forecasting accuracy of the two models in a condition of shallow groundwater level is compared. The results in 1980 show that the mean absolute errors and mean relative errors of the former for seven periods of two crops are 8.2 mm and 2.8% and the mean absolute errors and mean relative errors of the latter for seven periods of two crops are 20.1 mm and 6.8%. The forecasting accuracy of the dynamic forecasting models of soil moisture in winter wheat and soybean fields including phreatic water evaporation is improved notably.
- Shallow groundwater level;
- Winter wheat;
- Soybean;
- Forecasting models of soil moisture

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References(17)

Figures and Tables

图 1 宿县冬小麦土壤水分预报 (1980年，预报时效：10天，单位：mm)

(a) 返青期; (b) 拔节期; (c) 抽穗开花期 (-◆-预报值1;-■-预报值2;-▲-实测值)

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图 2 宿县大豆土壤水分预报 (1980年，预报时效:10天，单位:mm)

(a) 三叶期; (b) 旁枝形成期; (c)，(d) 结荚期 (-◆-预报值1;-■-预报值2;-▲-实测值)

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表 1 宿县2种土壤水分预报模型准确度比较 (预报时效:10天)

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