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  1. Book: Mapping irrigated areas in the Limpopo Province, South Africa

    Cai, Xueliang

    (IWMI working paper ; 172)

    2017  

    Author's details Xueliang Cai [und 3 weitere]
    Series title IWMI working paper ; 172
    IWMI working papers
    Collection IWMI working papers
    Language English
    Size ix, 27 Seiten, Diagramme, Karten
    Publisher International Water Management Institute (IWMI)
    Publishing place Colombo
    Publishing country Sri Lanka
    Document type Book
    HBZ-ID HT019341370
    ISBN 978-92-9090-851-7 ; 92-9090-851-3
    Database Catalogue ZB MED Nutrition, Environment, Agriculture

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    In stock of ZB MED Bonn / Germany

    Shelf markLoan statusLocation
    174/42 available for loan (reading room) Freihandmagazin (U1)

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  2. Book: An assessment of crop water productivity in the Indus and Ganges river basins

    Cai, Xueliang

    current status and scope for improvement

    (IWMI research report ; 140)

    2010  

    Author's details Xueliang Cai
    Series title IWMI research report ; 140
    Research report / International Water Management Institute
    Collection Research report / International Water Management Institute
    Language English
    Size VII, 22 S. : graph. Darst., Kt.
    Publisher IWMI
    Publishing place Colombo
    Publishing country Sri Lanka
    Document type Book
    HBZ-ID HT017202856
    ISBN 978-92-9090-735-0 ; 92-9090-735-5
    Database Catalogue ZB MED Nutrition, Environment, Agriculture

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    In stock of ZB MED Bonn / Germany

    Shelf markLoan statusLocation
    124/474 available for loan (reading room) Freihandmagazin (U1)

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  3. Book: Evaluating the flow regulating functions of natural ecosystems in the Zambezi river basin

    McCartney, Matthew P. / Cai, Xueliang / Smakhtin, Vladimir

    (IWMI research report ; 148)

    2013  

    Author's details Matthew McCartney, Xueliang Cai and Vladimir Smakhtin
    Series title IWMI research report ; 148
    Research report / International Water Management Institute
    Collection Research report / International Water Management Institute
    Language English
    Size VII, 51 S. : graph. Darst., Kt.
    Publisher IWMI
    Publishing place Colombo
    Publishing country Sri Lanka
    Document type Book
    HBZ-ID HT017690985
    ISBN 978-92-9090-763-3 ; 92-9090-763-0
    Database Catalogue ZB MED Nutrition, Environment, Agriculture

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    In stock of ZB MED Bonn / Germany

    Shelf markLoan statusLocation
    134/414 available for loan (reading room) Freihandmagazin (U1)

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  4. Article: Comparison of evapotranspiration measurements between eddy covariance and lysimeters in paddy fields under alternate wetting and drying irrigation

    Liu, Bo / Cai, Xueliang / Cui, Yuanlai / Luo, Yufeng / Shi, Yuanzhi / Zhang, Lei

    Paddy and water environment. 2019 Oct., v. 17, no. 4

    2019  

    Abstract: Evapotranspiration from paddy fields under alternate wetting and drying (AWD) irrigation was measured using lysimeters (ETL) and eddy covariance (ETec) during the late 2016 and early 2017 rice seasons. Four energy balance closing methods were explored, ... ...

    Abstract Evapotranspiration from paddy fields under alternate wetting and drying (AWD) irrigation was measured using lysimeters (ETL) and eddy covariance (ETec) during the late 2016 and early 2017 rice seasons. Four energy balance closing methods were explored, and discrepancy of ETL and ETec (with or without adjustment) in different growth stages and wet/dry conditions were examined. The results indicated that both energy balance non-closure and wet/dry conditions of the field affect the discrepancy of ETL and ETec. Energy balance was suggested to be closed each half hour by ‘residual-LE closure’ method only at daytime, and nighttime flux stayed unchanged, while a careful data control and interpolation should be noted for nighttime flux. In the meantime, wet-to-dry patterns of AWD irrigation can affect the discrepancy between ETec and ETL. In wet periods, ETec with suitable adjustment method was well matched with the ETL. However, ETL was underestimated in dry periods due to lower water content in the lysimeter. Finally, net radiation (Rn), vapor pressure deficit (VPD), air temperature (Ta), soil and water temperature (Ts and Tw), and wind speed (u) were selected to conduct path analysis on ETL and ETec (with adjustment) for both wet and dry conditions. The direct dependencies of each meteorological factor on ETL and ETec were similar under wet conditions; however, under dry conditions, VPD and Rn are the respective main controls for ETL and ETec. Moreover, ETL is more sensitive to Ta and Tw under wet conditions.
    Keywords air temperature ; developmental stages ; drying ; eddy covariance ; energy balance ; evapotranspiration ; irrigation ; lysimeters ; net radiation ; paddies ; path analysis ; rice ; soil temperature ; vapor pressure deficit ; water content ; water temperature ; wind speed
    Language English
    Dates of publication 2019-10
    Size p. 725-739.
    Publishing place Springer Singapore
    Document type Article
    ZDB-ID 2168266-5
    ISSN 1611-2490
    ISSN 1611-2490
    DOI 10.1007/s10333-019-00753-y
    Database NAL-Catalogue (AGRICOLA)

    Full text online

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    In stock of ZB MED Bonn / Germany

    Z 7524: Show issues

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  5. Article: Statistical data collection methodologies of irrigated areas and their limitations: a review

    Ajaz, Ali / Karimi, Poolad / Cai, Xueliang / De Fraiture, Charlotte / Akhter, Muhammad Saleem

    Irrigation and drainage. 2019 Oct., v. 68, no. 4

    2019  

    Abstract: Inconsistencies in the statistical data sets of irrigated areas at the national level could have considerable implications for policies developed for food and water security. Remote sensing can address this issue; however, doubts about its reliability ... ...

    Abstract Inconsistencies in the statistical data sets of irrigated areas at the national level could have considerable implications for policies developed for food and water security. Remote sensing can address this issue; however, doubts about its reliability inhibit its protagonist role. Methods that integrate both remote sensing based and statistical data sets seem expedient, and they are more likely to be acknowledged by policymakers. Therefore, it is important for scientists to know the basis and limitations of statistical data sets which originate at the country level. Data collection methodologies of irrigated areas have been reviewed for seven Asian countries, namely China, India, Pakistan, Bangladesh, Nepal, Indonesia and Thailand. Factors causing the uncertainties in data, and the limitations of data collection methodologies, were highlighted. Also, an irrigation density distribution analysis was conducted to understand the relation of spatial spread pattern of irrigated areas and uncertainty in their statistical records. It was found that irrigated area statistics are mostly based on information originating from water user associations and farmers, which is either self‐reported or collected through interviews during surveys and censuses. The main causes of discrepancy were lack of resources to frequently enumerate the irrigated land, inconsistency in data collection methodologies, unaccounted secondary crops, illegal and unregulated water use, and bureaucratic and political constraints. Irrigation density distribution analysis showed that largely scattered irrigated areas might be prone to a lack of comprehensive and frequent enumeration. Furthermore, dense irrigation regions might have potentially unrecorded irrigated areas where temporary or supplementary irrigation arrangements are made by marginal farmers. © 2019 John Wiley & Sons, Ltd.
    Keywords data collection ; irrigated farming ; irrigation ; politics ; uncertainty ; water security ; Bangladesh ; China ; India ; Indonesia ; Nepal ; Pakistan ; Thailand
    Language English
    Dates of publication 2019-10
    Size p. 702-713.
    Publishing place John Wiley & Sons, Ltd
    Document type Article
    Note NAL-AP-2-clean ; REVIEW
    ZDB-ID 2047418-0
    ISSN 1531-0361 ; 1531-0353
    ISSN (online) 1531-0361
    ISSN 1531-0353
    DOI 10.1002/ird.2365
    Database NAL-Catalogue (AGRICOLA)

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    In stock of ZB MED Bonn / Germany

    Z 3143: Show issues

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  6. Conference proceedings ; Online: Estimating regional water productivity of the Indus-Gangetic Basin

    Sharma, Bharat R. / Cai Xueliang

    Areas of concern and scope for improvement

    2011  

    Language English
    Publishing date 2011-10-26T06:11:27Z
    Publisher CGIAR Challenge Program on Water and Food
    Publishing country fr
    Document type Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

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  7. Article: Effects of Water Management Strategies on Water Balance in a Water Scarce Region: A Case Study in Beijing by a Holistic Model

    Peng, Zhigong / Zhang, Baozhong / Cai, Xueliang / Wang, Lei

    Sustainability. 2016 Aug. 04, v. 8, no. 8

    2016  

    Abstract: Irrigation is facing increasing pressure from other competitive water users to reduce water consumption in a water scarce region. Based on the Basin-wide Holistic Integrated Water Assessment (BHIWA) model, the effects of water management strategies on ... ...

    Abstract Irrigation is facing increasing pressure from other competitive water users to reduce water consumption in a water scarce region. Based on the Basin-wide Holistic Integrated Water Assessment (BHIWA) model, the effects of water management strategies on water balance in the dry regions of North China were analyzed. The results show that, with the decrease of irrigation water supply reliability (IWSR) and the increase of irrigation water use efficiency (WUE), irrigation water use decreased significantly, leading to reduced agriculture water consumption, and sustained ground water levels. Compared with the increase of WUE, the decrease of IWSR contributes more to reducing irrigation water consumption and protecting groundwater. Sensitivity tests show that among various water cycle components, irrigation water use is most sensitive to changes, followed by agriculture water consumption, and then groundwater level. Reducing IWSR is an effective strategy to reduce irrigation water consumption and promote sustainable water resources management, which could be the support of basic data and theory for regional water resources planning.
    Keywords case studies ; groundwater ; hydrologic cycle ; irrigation ; irrigation water ; models ; planning ; water management ; water supply ; water table ; water use efficiency ; China
    Language English
    Dates of publication 2016-0804
    Publishing place Multidisciplinary Digital Publishing Institute
    Document type Article
    ZDB-ID 2518383-7
    ISSN 2071-1050
    ISSN 2071-1050
    DOI 10.3390/su8080749
    Database NAL-Catalogue (AGRICOLA)

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  8. Article: Local storages: the impact on hydrology and implications for policy making in irrigation systems

    Cai, Xueliang / Cui, Yuanlai / Dai, Junfeng / Luo, Yufeng

    Water international. 2012 July 1, v. 37, no. 4

    2012  

    Abstract: OASIS, an irrigation diagnosis model, is applied to the Zhanghe Irrigation System in central China to investigate the contribution of smaller local storages (in “melons on the vine” configuration) as compared with the main reservoir. Results show that ... ...

    Abstract OASIS, an irrigation diagnosis model, is applied to the Zhanghe Irrigation System in central China to investigate the contribution of smaller local storages (in “melons on the vine” configuration) as compared with the main reservoir. Results show that local storages are more important in normal-to-wet years, while the main reservoir is critical in dry years, which implies a strong policy correction relevant to many parts of the world. Balanced investment in various storage infrastructures with associated management practices is a cost-effective strategy for irrigation development.
    Keywords cost effectiveness ; hydrology ; irrigation management ; irrigation systems ; issues and policy ; melons ; models ; vines ; China
    Language English
    Dates of publication 2012-0701
    Size p. 395-407.
    Publishing place Taylor & Francis
    Document type Article
    ISSN 1941-1707
    DOI 10.1080/02508060.2012.707380
    Database NAL-Catalogue (AGRICOLA)

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  9. Article: Producing more food with less water in a changing world: assessment of water productivity in 10 major river basins

    Cai, Xueliang / Molden, David / Mainuddin, Mohammed / Sharma, Bharat / Ahmad, Mobin-ud-Din / Karimi, Poolad

    Water international. 2011 Jan. 26, v. 36, no. 1

    2011  

    Abstract: This article summarizes the results of water productivity assessment in 10 river basins across Asia, Africa and South America, representing a range of agro-climatic and socio-economic conditions. Intensive farming in the Asian basins gives much greater ... ...

    Abstract This article summarizes the results of water productivity assessment in 10 river basins across Asia, Africa and South America, representing a range of agro-climatic and socio-economic conditions. Intensive farming in the Asian basins gives much greater agricultural outputs and higher water productivity. Largely subsistence agriculture in Africa has significantly lower water productivity. There is very high intra-basin variability, which is attributed mainly to lack of inputs, and poor water and crop management. Closing gaps between “bright spots” and the poorly performing areas are the major tasks for better food security and improved livelihoods, which have to be balanced with environmental sustainability.
    Keywords basins ; crop management ; environmental sustainability ; food security ; intensive farming ; livelihood ; subsistence farming ; watersheds ; Africa ; Asia ; South America
    Language English
    Dates of publication 2011-0126
    Size p. 42-62.
    Publishing place Taylor & Francis
    Document type Article
    ISSN 1941-1707
    DOI 10.1080/02508060.2011.542403
    Database NAL-Catalogue (AGRICOLA)

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  10. Conference proceedings ; Online: Current status and scope for improvement of agricultural water productivity in the Indo-Gangetic River Basin

    Cai, Xueliang / Sharma, Bharat R. / Matin, Mir Abdul

    2010  

    Abstract: Paper presented at the 3rd International Perspective on Current and Future State of Water Resources and Environment, Chennai, India, 5-7 January 2010. Paper No.270. ... This paper assesses the agricultural water consumption and productivity of the ... ...

    Abstract Paper presented at the 3rd International Perspective on Current and Future State of Water Resources and Environment, Chennai, India, 5-7 January 2010. Paper No.270.

    This paper assesses the agricultural water consumption and productivity of the predominant crop paddy rice and wheat for the Indo-Gangetic river basin (IGB) in South Asia. A new approach was adopted in the study to integrate census, remote sensing and weather data to assess crop water productivity (WP) across large scale. The average paddy field ET for rice for major growing period of June 10 to October 15 is 416 mm, which is 70% of rice potential evapotranspiration (ETp, equals to ET0*Kc). Average rice water productivity is 0.74 kg/m3. The average evapotranspiration (ETa) and WP of wheat is 299 mm and 0.94 kg/m3 respectively. Significant variations were observed for the ETa, yield and WP of rice and wheat. The scope for improvement of water productivity could be assessed by comparing “hot” and “bright” spots in consultation with factors such as rainfall and topography. It is found while improving yield in long term will finally lead to improved WP, reducing non-beneficial ET from low yield areas is a effective approach to improve WP in short term. Integrated land, crop and water management is the key to sustainable development of the region.
    Keywords Rice ; Wheat ; Cultivation ; Water productivity ; Irrigated farming ; Evapotranspiration ; Remote sensing ; South Asia ; Nepal ; India ; Pakistan ; Bangladesh ; China ; Afghanistan ; Indo-Gangetic River Basin ; Agribusiness ; Agricultural Finance ; Crop Production/Industries ; Farm Management ; International Development ; Productivity Analysis
    Subject code 333
    Language English
    Publishing country us
    Document type Conference proceedings ; Online
    Database BASE - Bielefeld Academic Search Engine (life sciences selection)

    Full text online

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