water-use efficiency Articles
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Water-use efficiency is negatively correlated with leaf epidermal conductance in cotton (Gossypium spp.)
Water-use efficiency (WUE) may be a useful trait for improving productivity of cotton (Gossypium spp.) under certain water-limited conditions, but it is difficult to measure in the field or in large controlled-environment screening studies. Recently, an easily measured trait, the epidermal conductance of dark-adapted leaves (gdark), was shown to be predictive of whole-plant WUE in soybean ...
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The spatial and temporal variation of water use efficiency in the Huai River Basin using a comprehensive indicator
A comprehensive indicator of water use efficiency (WUE) to promote coordinated development between socio-economic and environmental systems was developed. A comprehensive consideration of the social, economic and environmental benefits of water was made in the evaluation index system of WUE and the projection pursuit model combined with chaotic particle swarm optimization was adopted to ...
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A whole-of-the-catchment water accounting framework to facilitate public–private investments: an example from Australia
Often, information on spatial water use efficiencies in a whole-of-the-catchment context does not exist or does not feed into the water policy process to guide investments. Significant gains in water use efficiency are achievable but the water savings are often assumed rather than identified systematically. This paper used a whole-of-the-catchment water accounting framework to identify the main ...
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Regulation of water service and efficient use of water
This report highlights the need for policies targeted to sustainable use of water, which, at the same time, affect water service providers and the environment. Experience from several European countries can help us to identify efficient regulation mechanisms and the effect they could have on the Italian water sector. Some elements of United Kingdom regulation and some of the energy regulation ...
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Study on the water footprint and external water dependency of Beijing
Beijing has experienced rapid economic development and population growth during recent decades, aggravating water scarcity. In order to investigate the water consumption of Beijing, this paper quantitatively evaluates the water footprint (WF), the intensity of the water footprint (Iwf) and the external water dependency (WD) based on the top-down and bottom-up methods. We obtain the following ...
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Ozone impacts on assimilation and allocation to reproductive sinks in the vegetatively propagated C4 weed, yellow nutsedge
Crop production in many irrigated agricultural regions is challenged by both air pollution and weed pressure. Impacts of ozone (O3) on C4 plants have received little attention. Yet many important crops and weeds utilize the C4 pathway, including yellow nutsedge (Cyperus esculentus L.). A previous study suggested that this species may respond to O3 exposure with enhanced allocation of biomass ...
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Water infrastructure in Libya and the water situation in agriculture in the Jefara region of Libya
Information about the current state of water institutional frameworks, water infrastructure and water management policies in Libya enable the identification and evaluation of a range of options for improving water use efficiency in agriculture and the potential role of water pricing in achieving sustainability of water sources. This paper begins with an overview of the agricultural sector. In ...
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Municipal water demand and efficiency analysis: Case studies in Turkey
The growing demand for municipal water due to population increase and urbanization impels water managers to reconsider the existing traditional supply-sided management approach. Strengthening of water demand management (WDM) policies by improving water use efficiency has been adopted as a key target in arid regions, in particular. Indeed, increasing the added value per m3 of water used is gaining ...
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Reservoir operation management by optimization and stochastic simulation
The increase of population and socio-economic activities has escalated the water demand for various purposes and put stress on existing water resources across the world, in particular in arid and semi-arid countries. Hence, managing the optimum use of water resources is a crucial issue and it is imperative to adopt realistic policies to ensure water is used more efficiently in various sectors. ...
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Linkages with the quantitative assessment of water resources vulnerability: a new approach for adaptive water management under a changing environment
Climate change impact on water resources has been a global hot issue in recent years. In accordance with the latest research progress, a new meaning of water resources vulnerability (WRV) and a concept of adaptive water management have been proposed. For evaluating WRV under the changing environment in the Huai River Basin (HRB), the sixth largest river basin in China, a quantitative ...
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Water, energy and climate
We need to learn to consider critical issues such as water, energy, climate change, food, land, development and ecosystem services together. Boosting water and energy use efficiency through investment in relevant technologies and infrastructure are critical pathways to achieving the United Nations Millennium Development Goals. This article outlines the facts on the interconnections between ...
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Exploring Northwest China's agricultural water-saving strategy: analysis of water use efficiency based on an SE-DEA model conducted in Xi'an, Shaanxi Province
Worldwide, water scarcity threatens delivery of water to urban centers. Increasing water use efficiency (WUE) is often recommended to reduce water demand, especially in water-scarce areas. In this paper, agricultural water use efficiency (AWUE) is examined using the super-efficient data envelopment analysis (DEA) approach in Xi'an in Northwest China at a temporal and spatial level. The grey ...
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Assessing driving factors of regional water use in production sectors using a structural decomposition method: a case study in Jiangsu Province, China
A key issue in water resources management in China is the adoption of a total volume control framework of water supply at a regional level corresponding to socioeconomic development. This requires more efficient water demand management in order to achieve a balance between water supply and demand. The purpose of this paper is to conduct a thorough analysis of the water use structure of ...
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Evaluation of urban water resource security under urban expansion using a system dynamics model
Because of rapid economic development and urbanization, water shortage has become a serious problem in the arid region of China. To investigate urban water resource security, the supply demand pressure of water resources and the urban expansion index were analyzed under different developing scenarios in this paper. Based on the economic data of Urumqi, a typical inland city in the arid area, ...
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Water quantity auditing of a Ghanaian beverage plant
The study aimed at conducting a water quantity audit in a Ghanaian beverage plant. Primary data on the daily volumes of input water from the main reservoirs of the plant, daily volumes of beverage produced and the water consumed at the 8 metered stages of the plant out of a total of 12 stages were recorded over a period of four months. Secondary data on the plant's monthly water consumption was ...
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Cape Town intensifies water restrictions
Cape Town intensified water restrictions as South Africa’s worst drought in more than two decades left the city’s dam levels lower than normal. Users are required to cut water consumption by 20 percent from 10 percent, the City of Cape Town municipality said in a statement on its website. The restrictions started on Jan. 1. The curbs have been initiated to “preserve the ...
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Agricultural water conservation and efficiency in California: a special focus on the Delta
The Sacramento-San Joaquin Delta is a critical resource. Almost half of the water used for California’s agriculture comes from rivers that once flowed to the Delta and more than half of Californians rely on water conveyed through the Delta for at least some of their water supply. The Delta also provides habitat for 700 native plant and animal species. This important region is now in a serious, ...
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Evaluation of the applicability of the SWAT model in an arid piedmont plain oasis
Hetao Oasis is located in a typical piedmont alluvial plain bounded by the Langshan Mountain Range in the north, desert in the west, and the Yellow River in the south. Agricultural activities within the oasis significantly impact the hydrological cycle and water quality in downstream locations. The research uses the Soil and Water Assessment Tool (SWAT) for a piedmont plain by defining the ...
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Suitability of cotton as an alternative crop in the ogallala aquifer region
Renewed interest in cotton (Gossypium hirsutum L.) production in the Ogallala Aquifer Region can be linked to development of early maturing varieties, rising energy costs, and declining water levels in the Ogallala Aquifer. The main objectives of this study were to assess the feasibility of growing cotton and estimate the cotton yield potential and the potential reduction in Ogallala Aquifer ...
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Characterization of preferential flow pathways through Paddy bunds with dye tracer tests
In terraced paddy landscapes, water losses through the bunds surrounding paddy rice (Oryza sativa L.) fields may significantly reduce water use efficiency. The objective of this research was to identify the dominant pathways active for water flow and solute transport in bunds, and to detect differences between the bunds and adjacent field areas. Two earthen bunds aged 20 and 100 yr were ...
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