The Experts below are selected from a list of 22155 Experts worldwide ranked by ideXlab platform
Maria Del Carmen - One of the best experts on this subject based on the ideXlab platform.
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diagnostico de desempeno individual el caso del departamento de administracion de un distrito de riego diagnosis of individual performance the case of the department of administration of an Irrigation District
Social Science Research Network, 2015Co-Authors: Vasquez Torres, Maria Del CarmenAbstract:Spanish Abstract: En la busqueda de un mejor desempeno individual que apoye el logro de metas organizacionales, se realizo un diagnostico al personal del departamento de administracion de un Distrito de Riego en la ciudad de Navojoa, Sonora, Mexico, para generar estrategias que conduzcan a alinear el comportamiento de los trabajadores con el proposito del Distrito. El nivel de desempeno individual se definio en porcentajes a traves de la aplicacion de un cuestionario bajo el modelo de Tomas Gilbert publicado en 1978. Los resultados mas significativos estuvieron relacionados con la deficiencia en la claridad y conocimiento de las metas; las tareas no se encuentran organizadas adecuadamente, se considero que el ambiente laboral no es adecuado y estimulante para el logro de las metas; por otra parte, la respuesta de los trabajadores no permite afirmar que la retroalimentacion proporcionada sea suficiente, oportuna, relevante, precisa, constructiva ni comprensible. Como conclusion se hace enfasis en los factores que requieren atencion de forma prioritaria son los relacionados con el establecimiento formal de estandares y metas; asi como tambien la deficiencia que se observa en materia de ambiente laboral. Por ello se recomendo elaborar e implementar un plan gerencial con acciones concretas que permita mejorar estos aspectos. English Abstract: In the search for better individual performance that supports the achievement of organizational goals, a diagnosis was made the Department of administration staff of an Irrigation District in the city of Navojoa, Sonora, Mexico. The objective is to build strategies that align the behavior of workers for the purpose of the District. The level of individual performance was defined in percentages through the application of a questionnaire under Tomas Gilbert’s model published in 1978. The most significant results were related to deficiency in the clarity and understanding of goals and tasks that are not organized properly. We considered the working environment is not appropriate and stimulating for the achievement of goals. On the other hand, the response of workers does not affirm that the feedback provided is sufficient, timely, relevant, accurate, constructive or understandable. The conclusion emphasizes factors requiring priority attention are those related to the formal establishment of standards and goals as well as the deficiency observed in the area of working environment.
Vasquez Torres - One of the best experts on this subject based on the ideXlab platform.
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diagnostico de desempeno individual el caso del departamento de administracion de un distrito de riego diagnosis of individual performance the case of the department of administration of an Irrigation District
Social Science Research Network, 2015Co-Authors: Vasquez Torres, Maria Del CarmenAbstract:Spanish Abstract: En la busqueda de un mejor desempeno individual que apoye el logro de metas organizacionales, se realizo un diagnostico al personal del departamento de administracion de un Distrito de Riego en la ciudad de Navojoa, Sonora, Mexico, para generar estrategias que conduzcan a alinear el comportamiento de los trabajadores con el proposito del Distrito. El nivel de desempeno individual se definio en porcentajes a traves de la aplicacion de un cuestionario bajo el modelo de Tomas Gilbert publicado en 1978. Los resultados mas significativos estuvieron relacionados con la deficiencia en la claridad y conocimiento de las metas; las tareas no se encuentran organizadas adecuadamente, se considero que el ambiente laboral no es adecuado y estimulante para el logro de las metas; por otra parte, la respuesta de los trabajadores no permite afirmar que la retroalimentacion proporcionada sea suficiente, oportuna, relevante, precisa, constructiva ni comprensible. Como conclusion se hace enfasis en los factores que requieren atencion de forma prioritaria son los relacionados con el establecimiento formal de estandares y metas; asi como tambien la deficiencia que se observa en materia de ambiente laboral. Por ello se recomendo elaborar e implementar un plan gerencial con acciones concretas que permita mejorar estos aspectos. English Abstract: In the search for better individual performance that supports the achievement of organizational goals, a diagnosis was made the Department of administration staff of an Irrigation District in the city of Navojoa, Sonora, Mexico. The objective is to build strategies that align the behavior of workers for the purpose of the District. The level of individual performance was defined in percentages through the application of a questionnaire under Tomas Gilbert’s model published in 1978. The most significant results were related to deficiency in the clarity and understanding of goals and tasks that are not organized properly. We considered the working environment is not appropriate and stimulating for the achievement of goals. On the other hand, the response of workers does not affirm that the feedback provided is sufficient, timely, relevant, accurate, constructive or understandable. The conclusion emphasizes factors requiring priority attention are those related to the formal establishment of standards and goals as well as the deficiency observed in the area of working environment.
Xining Zhao - One of the best experts on this subject based on the ideXlab platform.
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evaluation of crop production trade and consumption from the perspective of water resources a case study of the hetao Irrigation District china for 1960 2010
Science of The Total Environment, 2015Co-Authors: Pute Wu, Yubao Wang, Xining ZhaoAbstract:Abstract The integration of water footprints and virtual water flows allows the mapping of the links between production, trade, and consumption and could potentially help to alleviate water scarcity and improve water management. We evaluated the water footprints and virtual water flows of crop production, consumption, and trade and their influencing factors in the Hetao Irrigation District in China for 1960–2010. The water footprint of crop production and the export of virtual water fluctuated but tended to increase during this period and were influenced mainly by agricultural factors such as crop yield, Irrigation efficiency, and area sown. The water footprint of crop consumption and the import of virtual water increased during 1960–1979 and decreased during 1980–2010 and were influenced by socio-economic factors such as total population, the retail-price index, and the proportion of the population in urban areas. Most of the water footprint of production was exported to other areas, which added to the pressure on local water systems. The import of virtual water led to a saving of water for the Hetao Irrigation District, while its share of the water footprint of consumption has decreased significantly since 1977. An increase in Irrigation efficiency can alleviate water scarcity, and its application should be coupled with measures that constrain the continued expansion of agriculture. Full-cost pricing of Irrigation water was an effective policy tool for its management. Re-shaping regional water-production and water-trade nexuses by changing crop structures could provide alternative opportunities for addressing the problems of local water scarcity, but the trade-offs involved should first be assessed.
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virtual water flows related to grain crop trade and their influencing factors in hetao Irrigation District china
Journal of Agricultural Science and Technology, 2015Co-Authors: Pute Wu, Ying Wang, Xining ZhaoAbstract:Virtual water adds a new dimension to crop trades and provides a new way of thinking about water scarcity. A systematic analysis of virtual water flows requires integration of all critical drivers of virtual water flows under a single consistent framework. The aim of this study was to assess virtual water flows related to trades of grain crops (wheat, corn, rice, and coarse cereals) and their influencing factors in Hetao Irrigation District, China during 1981-2010. Results indicated that: (1) volume of virtual water export decreased from 2.08×10 9 m 3 in 1981 to 1.27×10 9 m 3 in 2010. Volume of virtual water import fluctuated around 621.48×10 6 m 3 during study period; (2) Cultivated area per capita and total population were the major influencing factors for virtual water export in Hetao Irrigation District. Volume of virtual water import was mainly influenced by consumption and retail price index of grain crops. Combination of large volume of virtual water export and severely constrained water resources confronted Hetao Irrigation District with great challenges in its sustainable development. Decreasing virtual water export is a mean to alleviate regional water shortage pressure, and may be achieved by measures that constrain continued population expansion.
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the impacts of interannual climate variability and agricultural inputs on water footprint of crop production in an Irrigation District of china
Science of The Total Environment, 2013Co-Authors: Shikun Sun, Yubao Wang, Xining Zhao, Jing Liu, Xiaohong ZhangAbstract:Abstract Irrigation plays an increasing important role in agriculture of China. The assessment of water resources utilization during agricultural production process will contribute to improving agricultural water management practices for the Irrigation Districts. The water footprint provides a new approach to assessing the agricultural water utilization. The present paper put forward a modified calculation method to quantify the water footprint of crop. On this basis, this paper calculated the water footprint of major crop in Hetao Irrigation District, China. Then, it evaluated the influencing factors that caused the variability of crop water footprint during the study period. Results showed that: 1) the annual average water footprint of integrated-crop production in Hetao Irrigation District was 3.91 m 3 kg − 1 (90.91% blue water and 9.09% green water). The crop production in the Hetao Irrigation District mainly relies on blue water; 2) under the integrated influences of interannual climate variability and variation of agricultural inputs, the water footprint of integrated-crop production displayed a decreasing trend; 3) the contribution rate of the climatic factors to the variation of water footprint was only − 6.90%, while the total contribution rate of the agricultural inputs factors was − 84.31%. The results suggest that the water footprint of crop mainly depends on agricultural management rather than the regional climate and its variation. The results indicated that the water footprint of a crop could be controlled at a reasonable level by better management of all agricultural inputs and the improvement of water use efficiency in agriculture.
Yubao Wang - One of the best experts on this subject based on the ideXlab platform.
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impact of land use change on hydrologic processes in a large plain Irrigation District
Water Resources Management, 2018Co-Authors: Xiaobo Luan, Pute Wu, Xiaolei Li, Yubao WangAbstract:Abstract Land use is the main factor that influences catchment hydrologic processes, and a better understanding of its effect is important for future land use planning and water resource management. By applying the Soil and Water Assessment Tool (SWAT), we assessed the effects of land use changes on major hydrologic processes (evapotranspiration (ET), discharge, river) on a large plain Irrigation District, the Hetao Irrigation District (HID), China. The results indicated that SWAT was a useful tool for simulating the effects of land use changes on regional hydrologic processes. Human activities were the main factors that directly influenced land use in the HID. Land use changes had important impacts on the hydrologic processes of the HID. During 1995–2010, the land use changed greatly in the HID, leading to the changes in ET and discharge. The peak value of ET coincided with the exuberant crop growth period in the maximized sown crop area. In 1995s, wheat maximized the sown area and ET peaked in June; when sunflower and corn maximized the sown area in 2010s, ET peaked in July and August. The increased ET reduced discharge in the same period in the HID. Land use change affected the period and quantity of water diversion in the Irrigation District. The quantity of water diverted in 1995 was greater than that in 2010, indicating that land use change significantly impacted the water quantity of the river, which was the water source of the Irrigation District. This study will be a reference for future land use planning and water resource management in the Irrigation District.
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impact of future climate change on regional crop water requirement a case study of hetao Irrigation District china
Water, 2017Co-Authors: Tianwa Zhou, Shikun Sun, Yubao Wang, Xiaobo LuanAbstract:Water shortage is a limiting factor for agricultural production in China, and climate change will affect agricultural water use. Studying the effects of climate change on crop Irrigation requirement (CIR) would help to tackle climate change, from both food security and sustainable water resource use perspectives. This paper applied SDSM (Statistical DownScaling Model) to simulate future meteorological parameters in the Hetao Irrigation District (HID) in the time periods 2041–2070 and 2071–2099, and used the Penman–Monteith equation to calculate reference crop evapotranspiration (ET0), which was further used to calculate crop evapotranspiration (ETc) and crop water requirement (CWR). CWR and predicted future precipitation were used to calculate CIR. The results show that the climate in the HID will become warmer and wetter; ET0 would would increase by 4% to 7%; ETc and CWR have the same trend as ET0, but different crops have different increase rates. CIR would increase because of the coefficient of the increase of CWR and the decrease of effective precipitation. Based on the current growing area, the CIR would increase by 198 × 106 to 242 × 106 m3 by the year 2041–2070, and by 342 × 106 to 456 × 106 m3 by the years 2071–2099 respectively. Future climate change will bring greater challenges to regional agricultural water use.
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agricultural water rights trading and virtual water export compensation coupling model a case study of an Irrigation District in china
Agricultural Water Management, 2017Co-Authors: Yubao Wang, Donghua Liu, Xinchun Cao, Zhi Yang, Jianfeng Song, Dianyu Chen, Shikun SunAbstract:Abstract Water rights trading is an effective way to promote efficient water allocation. The implementation of agricultural water rights trading can promote water saving, but may reduce the agricultural production scale in Irrigation Districts. Compensation for crop virtual water export can increase the benefits of agricultural water use, so as to enhance the competitiveness of economic benefit for agricultural production. This paper analyzed the relationship between agricultural water rights trading and virtual water export compensation, then a bi-level programming model was established with multiple objectives. The model was applied in Hetao Irrigation District by using enumeration method. The changes of new water use of different users, benefits of Irrigation District and water users with different water prices were analyzed and the optimization schemes were selected. Results show that the model through adjusting price variables including both water rights trading price and virtual water compensation price to optimize the allocation of agricultural water quantity saved among different water users, which at the same time makes both the Irrigation management administration and water users get more benefit. The optimized scheme can raise the willingness of water saving in Irrigation District, and enhance the competitiveness of agricultural water user against non-agricultural water user. This study provides a new method and scientific basis for the water resource management agency in their policy making.
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evaluation of crop production trade and consumption from the perspective of water resources a case study of the hetao Irrigation District china for 1960 2010
Science of The Total Environment, 2015Co-Authors: Pute Wu, Yubao Wang, Xining ZhaoAbstract:Abstract The integration of water footprints and virtual water flows allows the mapping of the links between production, trade, and consumption and could potentially help to alleviate water scarcity and improve water management. We evaluated the water footprints and virtual water flows of crop production, consumption, and trade and their influencing factors in the Hetao Irrigation District in China for 1960–2010. The water footprint of crop production and the export of virtual water fluctuated but tended to increase during this period and were influenced mainly by agricultural factors such as crop yield, Irrigation efficiency, and area sown. The water footprint of crop consumption and the import of virtual water increased during 1960–1979 and decreased during 1980–2010 and were influenced by socio-economic factors such as total population, the retail-price index, and the proportion of the population in urban areas. Most of the water footprint of production was exported to other areas, which added to the pressure on local water systems. The import of virtual water led to a saving of water for the Hetao Irrigation District, while its share of the water footprint of consumption has decreased significantly since 1977. An increase in Irrigation efficiency can alleviate water scarcity, and its application should be coupled with measures that constrain the continued expansion of agriculture. Full-cost pricing of Irrigation water was an effective policy tool for its management. Re-shaping regional water-production and water-trade nexuses by changing crop structures could provide alternative opportunities for addressing the problems of local water scarcity, but the trade-offs involved should first be assessed.
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the impacts of interannual climate variability and agricultural inputs on water footprint of crop production in an Irrigation District of china
Science of The Total Environment, 2013Co-Authors: Shikun Sun, Yubao Wang, Xining Zhao, Jing Liu, Xiaohong ZhangAbstract:Abstract Irrigation plays an increasing important role in agriculture of China. The assessment of water resources utilization during agricultural production process will contribute to improving agricultural water management practices for the Irrigation Districts. The water footprint provides a new approach to assessing the agricultural water utilization. The present paper put forward a modified calculation method to quantify the water footprint of crop. On this basis, this paper calculated the water footprint of major crop in Hetao Irrigation District, China. Then, it evaluated the influencing factors that caused the variability of crop water footprint during the study period. Results showed that: 1) the annual average water footprint of integrated-crop production in Hetao Irrigation District was 3.91 m 3 kg − 1 (90.91% blue water and 9.09% green water). The crop production in the Hetao Irrigation District mainly relies on blue water; 2) under the integrated influences of interannual climate variability and variation of agricultural inputs, the water footprint of integrated-crop production displayed a decreasing trend; 3) the contribution rate of the climatic factors to the variation of water footprint was only − 6.90%, while the total contribution rate of the agricultural inputs factors was − 84.31%. The results suggest that the water footprint of crop mainly depends on agricultural management rather than the regional climate and its variation. The results indicated that the water footprint of a crop could be controlled at a reasonable level by better management of all agricultural inputs and the improvement of water use efficiency in agriculture.
Shikun Sun - One of the best experts on this subject based on the ideXlab platform.
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impact of future climate change on regional crop water requirement a case study of hetao Irrigation District china
Water, 2017Co-Authors: Tianwa Zhou, Shikun Sun, Yubao Wang, Xiaobo LuanAbstract:Water shortage is a limiting factor for agricultural production in China, and climate change will affect agricultural water use. Studying the effects of climate change on crop Irrigation requirement (CIR) would help to tackle climate change, from both food security and sustainable water resource use perspectives. This paper applied SDSM (Statistical DownScaling Model) to simulate future meteorological parameters in the Hetao Irrigation District (HID) in the time periods 2041–2070 and 2071–2099, and used the Penman–Monteith equation to calculate reference crop evapotranspiration (ET0), which was further used to calculate crop evapotranspiration (ETc) and crop water requirement (CWR). CWR and predicted future precipitation were used to calculate CIR. The results show that the climate in the HID will become warmer and wetter; ET0 would would increase by 4% to 7%; ETc and CWR have the same trend as ET0, but different crops have different increase rates. CIR would increase because of the coefficient of the increase of CWR and the decrease of effective precipitation. Based on the current growing area, the CIR would increase by 198 × 106 to 242 × 106 m3 by the year 2041–2070, and by 342 × 106 to 456 × 106 m3 by the years 2071–2099 respectively. Future climate change will bring greater challenges to regional agricultural water use.
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agricultural water rights trading and virtual water export compensation coupling model a case study of an Irrigation District in china
Agricultural Water Management, 2017Co-Authors: Yubao Wang, Donghua Liu, Xinchun Cao, Zhi Yang, Jianfeng Song, Dianyu Chen, Shikun SunAbstract:Abstract Water rights trading is an effective way to promote efficient water allocation. The implementation of agricultural water rights trading can promote water saving, but may reduce the agricultural production scale in Irrigation Districts. Compensation for crop virtual water export can increase the benefits of agricultural water use, so as to enhance the competitiveness of economic benefit for agricultural production. This paper analyzed the relationship between agricultural water rights trading and virtual water export compensation, then a bi-level programming model was established with multiple objectives. The model was applied in Hetao Irrigation District by using enumeration method. The changes of new water use of different users, benefits of Irrigation District and water users with different water prices were analyzed and the optimization schemes were selected. Results show that the model through adjusting price variables including both water rights trading price and virtual water compensation price to optimize the allocation of agricultural water quantity saved among different water users, which at the same time makes both the Irrigation management administration and water users get more benefit. The optimized scheme can raise the willingness of water saving in Irrigation District, and enhance the competitiveness of agricultural water user against non-agricultural water user. This study provides a new method and scientific basis for the water resource management agency in their policy making.
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the impacts of interannual climate variability and agricultural inputs on water footprint of crop production in an Irrigation District of china
Science of The Total Environment, 2013Co-Authors: Shikun Sun, Yubao Wang, Xining Zhao, Jing Liu, Xiaohong ZhangAbstract:Abstract Irrigation plays an increasing important role in agriculture of China. The assessment of water resources utilization during agricultural production process will contribute to improving agricultural water management practices for the Irrigation Districts. The water footprint provides a new approach to assessing the agricultural water utilization. The present paper put forward a modified calculation method to quantify the water footprint of crop. On this basis, this paper calculated the water footprint of major crop in Hetao Irrigation District, China. Then, it evaluated the influencing factors that caused the variability of crop water footprint during the study period. Results showed that: 1) the annual average water footprint of integrated-crop production in Hetao Irrigation District was 3.91 m 3 kg − 1 (90.91% blue water and 9.09% green water). The crop production in the Hetao Irrigation District mainly relies on blue water; 2) under the integrated influences of interannual climate variability and variation of agricultural inputs, the water footprint of integrated-crop production displayed a decreasing trend; 3) the contribution rate of the climatic factors to the variation of water footprint was only − 6.90%, while the total contribution rate of the agricultural inputs factors was − 84.31%. The results suggest that the water footprint of crop mainly depends on agricultural management rather than the regional climate and its variation. The results indicated that the water footprint of a crop could be controlled at a reasonable level by better management of all agricultural inputs and the improvement of water use efficiency in agriculture.
