نتایج جستجو برای: agricultural water

تعداد نتایج: 635409  

2007
I. Heinz

This paper discusses the significance of voluntary arrangements for the water and agricultural policies in the European Union. The current implementation of the European Water Framework Directive (WFD) and the reform of the Common Agricultural Policy (CAP) require new approaches in water management. As many case studies have shown, co-operative agreements (CAs) between water companies, farmers ...

2011
Edmund C. Merem Sudha Yerramilli Yaw A. Twumasi Joan M. Wesley Bennetta Robinson Chandra Richardson

With water resource planning assuming greater importance in environmental protection efforts, analyzing the health of agricultural watersheds using Geographic Information Systems (GIS) becomes essential for decision-makers in Southern Texas. Within the area, there exist numerous threats from conflicting land uses. These include the conversion of land formerly designated for agricultural purpose...

2013
Robert I. McDonald Evan H. Girvetz

Agricultural irrigation practices will likely be affected by climate change. In this paper, we use a statistical model relating observed water use by U.S. producers to the moisture deficit, and then use this statistical model to project climate changes impact on both the fraction of agricultural land irrigated and the irrigation rate (m³ ha⁻¹). Data on water withdrawals for US states (1985-2005...

2015
Kathryn E. Sanders Robert B. Gillespie James D. Haddock Deborah D. Ross Frank V. Paladino

Sanders, Kathryn E. M.S., Purdue University, May 2012. Relative Importance of Water Quality and Habitat to Fish Communities in Streams Influenced by Agricultural Land Use in the Cedar Creek Watershed, Indiana. Major Professor: Robert B. Gillespie. Agricultural land use has been shown to negatively impact fish communities in headwater streams that also serve as agricultural drainage ditches. The...

2017
Mutlu Ozdogan Curtis E. Woodcock Guido D. Salvucci Hüseyin Demir MUTLU OZDOGAN CURTIS E. WOODCOCK GUIDO D. SALVUCCI

Changes in summer irrigated cropland acreage and related water use are estimated from satellite remote sensing and ancillary data in semi-arid Southeastern Turkey where traditionally dry agricultural lands are being rapidly transformed into irrigated fields with the help of water from the Euphrates-Tigris Rivers. An image classification methodology based on thresholding of Landsat NDVI images f...

Journal: :Journal of environmental quality 2003
Robert J Mitchell R Scott Babcock Sharon Gelinas Leora Nanus David E Stasney

The Abbotsford-Sumas Aquifer is a shallow, predominantly unconfined aquifer that spans regions in southwestern British Columbia, Canada and northwestern Washington, USA. The aquifer is prone to nitrate contamination because of extensive regional agricultural practices. A 22-month ground water nitrate assessment was performed in a 10-km2 study area adjacent to the international boundary in north...

Journal: Iranian Economic Review 2019

The imbalance between water supply and demand in the country has challenged water resource management, especially in the agricultural sector. The virtual water study approach, as an approach that values the use of water inputs in the production and consumption of various commodities, has been established and discussed for almost two decades. Based on this concept, the issue of virtual water tra...

2011
Pasquale Nino Flavio Lupia Filiberto Altobelli Silvia Vanino Iraj Namdarian

Agriculture is the largest user of water on the planet with a 70% of all freshwater withdrawals. Today the growing scarcity and competition for water among agricultural, industrial, commercial and residential sectors are pushing the water managers to allocate water more efficiently. In this scenario the use of methodologies and tools for better monitor and schedule the irrigation water for the ...

2017
Shuo Cai Hong Shi Xiaohua Pan Fangping Liu Yuanlai Cui Hengwang Xie

This study addresses the excessive consumption of river basin water from the Poyang Lake area in China. Consumption of water for irrigation, together with the discharge of agricultural non-point source pollution, is seriously affecting the water quality of Poyang Lake. This study assesses the application of integrated ecological restoration technology for agricultural non-point source pollution...

Journal: :Anales del sistema sanitario de Navarra 2009
P Fraile M Izu I Sáiz J Castiella J A Pérez de Ciriza

BACKGROUND The aim of the study was to obtain information on the residues of herbicides (imazametabenz, simazine, isoproturon, clortoluron, metribuzine, atrazine, cianazine, terbutrin, propanil, terbutilazine, alachlor and pendimetalin) present in water proceeding from Navarre. MATERIAL AND METHODS A total of 465 samples of water were taken: 378 were taken from 141 water supplies; the remaini...

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