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Journal Article 4

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2020 1

2010 1

2002 1

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evapotranspiration 2

North China 1

atural restoration 1

catchment evapotranspiration 1

crop coefficient 1

distributed hydrological model 1

ecological restoration projects 1

eddy covariance 1

irrigation 1

irrigation schedule 1

microlysimeter 1

net primary productivity 1

real-time forecast 1

sap flow 1

soil evaporation 1

top-down and bottom-up approaches 1

transpiration 1

water storage 1

water-energy balance model 1

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Analysis of catchment evapotranspiration at different scales using bottom-up and top-down approaches

Xiangyu XU, Dawen YANG,

Frontiers of Structural and Civil Engineering 2010, Volume 4, Issue 1, Pages 65-77 doi: 10.1007/s11709-010-0002-9

Abstract: ., top-down approach) are used to predict actual evapotranspiration in nine sub-catchments, and the wholeBoth simulations give very close values of annual evapotranspiration and show the same complementaryrelationship between actual and potential evapotranspiration at annual time scale.is controlled mainly by annual precipitation and potential evapotranspiration, and the variability ofIt is also known that the relationship between potential and actual evapotranspiration shows a highly

Keywords： catchment evapotranspiration distributed hydrological model water-energy balance model top-down and bottom-up

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Comparison of evapotranspiration and energy partitioning related to main biotic and abiotic controllers

Lei GAO, Peng ZHAO, Shaozhong KANG, Sien LI, Ling TONG, Risheng DING, Hongna LU

Frontiers of Agricultural Science and Engineering 2020, Volume 7, Issue 4, Pages 490-504 doi: 10.15302/J-FASE-2019310

Abstract:

Knowledge of evapotranspiration (ET) and energy partitioning is useful for optimizing water management

Keywords： crop coefficient eddy covariance microlysimeter sap flow soil evaporation transpiration

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Real-time Forecast of Irrigation

Mao Zhi,Li Yuanhua,Li Huichang

Strategic Study of CAE 2002, Volume 4, Issue 5, Pages 24-33

Abstract:

The real-time forecast of irrigation is one of the essential part of the work for compiling a dynamic plan of irrigation water use. It plays an important role in saving water, increasing crop yields and economic benefits in an irrigation area. The real-time forecast of water requirements of crops is the essential and difficult part in the real-time foreast of irrigation. The methods and models for the conventional forecast of crop water requirement ,applied both in China and the world, are based on the application of the historic data from typical hydro-logic years. They can not used for the real-time forecast. In this paper, on the basis of the analyses of the relationship between the crop water requirements and the meteorological factors and non-meteorological factors such as the factors of plant and soil, the method and models for the real-time forecast of crop water requirements based on the factors of weather types, leaves cover percentage and effective soil moisture are presented and recommended. The concrete steps and computer block diagram are introduced. The main improvements are that the weather type is used instead of such four meteorological factors in Modified Peman's Eguation as air temperature, humidity, sunshine hour and wind speed,the leaves cover percentage is used instead of the leaves area index, and an improved equation for calculating soil moisture correction coefficient is proposed. Based on the results of the real-time forecast of crop water requirement and precipitation, the real-time measurement of soil moisture (for dry food crops fields) or depth of water layer (for paddy fields) and the maximum and minimum values of soil moisture content or water depth for getting high yields and saving water, and the calculation of field water balance, the method and models of real-time irrigation forecast including the real-time forecast of the date and quota of irrigation for both dry food crops fields and paddy fields are presented. In this paper, the precision of the real-time forecast and its effects on increasing yield and saving water are also introduced and discussed.

Keywords： irrigation real-time forecast evapotranspiration irrigation schedule

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Water Resource Effectiveness of Vegetation Conservation and Restoration in North China

Sun Siqi,Chen Yongzhe,Wang Cong,Hu Qingfang,Lyu Yihe

Strategic Study of CAE 2022, Volume 24, Issue 5, Pages 97-106 doi: 10.15302/J-SSCAE-2022.05.012

Abstract: approximately 2.3 times faster than that outside the project area; the vegetation expansion and evapotranspirationshow strong spatial and temporal correlations; and the increase in evapotranspiration owing to

Keywords： North China ecological restoration projects evapotranspiration water storage net primary productivity