检索结果-南通市图书馆

Estimating daily actual evapotranspiration of a rice–wheat rotation system in typical farmland in the huai river basin using a two-step model and two one-step models

引用

Journal of Integrative Agriculture 2021年第1期20卷 274-288页

作者： LI Meng CHU Rong-hao Abu Reza Md.Towfiqul ISLAM JIANG Yue-lin SHEN Shuang-he School of Resources and Environment Anhui Agricultural UniversityHefei 230036P.R.China Hefei Scientific Observing and Experimental Station of Agro-Environment Ministry of Agriculture and Rural AffairsP.R.China Anhui Public Meteorological Service Center Anhui Meteorological BureauHefei 230031P.R.China Department of Disaster Management Begum Rokeya UniversityRangpur 5400Bangladesh Key Laboratory of Meteorological Disaster Ministry of Education(KLME)ZJoint International Research Laboratory of Climate and Environment Change(ILCEC)/Collaborative Innovation Center on Forecast and Evaluation of Meteorological Disasters(CICFEMD)/Jiangsu Key Laboratory of Agricultural MeteorologyCollege of Applied MeteorologyNanjing University of Information Science&TechnologyNanjing 210044P.R.China

The objective of this study is to evaluate the performance of three models for estimating daily evapotranspiration(ET) by employing flux observation data from three years(2007, 2008 and 2009) during the growing seasons of winter wheat and rice crops cultivated in a farmland ecosystem(Shouxian County) located in the huai river basin(HRB), China. The first model is a two-step model(PM-Kc);the other two are one-step models(e.g., Rana-Katerji(R-K) and advection-aridity(AA)). The results showed that the energy closure degrees of eddy covariance(EC) data during winter wheat and rice-growing seasons were reasonable in the HRB, with values ranging from 0.84 to 0.91 and R2 of approximately 0.80. Daily ET of winter wheat showed a slow decreasing trend followed by a rapid increase, while that of rice presented a decreasing trend after an increase. After calibrating the crop coefficient(Kc), the PM–Kc model performed better than the model using the Kc recommended by the Food and Agricultural Organization(FAO). The calibrated key parameters of the R-K model and AA model showed better universality. After calibration, the simulation performance of the PM-Kc model was satisfactory. Both the R-K model and AA model underestimated the daily ET of winter wheat and rice. Compared with that of the R-K model, the simulation result of the AA model was better, especially in the simulation of daily ET of rice. Overall, this research highlighted the consistency of the PM-Kc model to estimate the water demand for rice and wheat crops in the HRB and in similar climatic regions in the world.

关键词： daily evapotranspiration crop coefficient crop water demand rice–wheat rotation system huai river basin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Assessment of dam impacts on river flow regimes and water quality:a case study of the huai river basin in ***

引用

Journal of Chongqing University 2008年第4期7卷 261-276页

作者：夏军张永勇 Key Laboratory of Water Cycle and Related Land Surface Processes the Institute of Geographical Sciences and Natural Resources Research Chinese Academy of Sciences State Key Laboratory of Water Resources and Hydropower Engineering Science Wuhan University

The huai river basin is a unique area in *** with the highest densities of population and water *** is also subject to the most serious water *** proposed a distributional SWAT(Soil and Water Assessment Tool) model coupled with a water quality-quantity balance model to evaluate dam impacts on river flow regimes and water quality in the middle and upper reaches of the huai river *** calibrated and validated the SWAT model with data from 29 selected cross-sections in four typical years(1971,1981,1991 and 1999) and used scenario analysis to compensate for the unavailability of historical data regarding uninterrupted river flows before dam and floodgate construction,a problem of prediction for ungauged *** results indicate that dam and floodgate operations tended to reduce runoff,decrease peak value and shift peaking *** contribution of water projects to river water quality deterioration in the concerned river system was between 0 to 40%,while pollutant discharge contributed to 60% to 100% of the water *** control should therefore be the key to the water quality rehabilitation in the huai river basin.

关键词： dams river control river basin projects prediction in ungauged basins flow regime water environment huai river basin

来源：

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

欢迎您,

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案：

请选择收藏分类：

通借通还

欢迎您,

建议与咨询 留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

时间限定

文献类型

馆藏选择

核心期刊

语言

文献类型

帮助

文字说明：

检索规则说明：

检索范例：

分类表

所选分类

限定检索结果

文献类型

馆藏范围

日期分布

学科分类号

主题

机构

作者

语言

在线全文

在线全文

请选择保存的检索档案： 新增检索档案 确定 取消

请选择收藏分类： 新增自定义分类 确定 取消

通借通还

建议与咨询留下您的常用邮箱和电话号码，以便我们向您反馈解决方案和替代方法

请选择保存的检索档案：

请选择收藏分类：