نتایج جستجو برای: irrigated area

تعداد نتایج: 591575  

2006
T. Adair Wheaton Lawrence R. Parsons

A water use simulation for citrus (Citrus sinensis) was used to estimate the effects of climate, soil-available water, rooting depth, allowable depletion of available water, and partial coverage irrigation on the annual irrigation requirements. The soil in the study was excessively drained Candler sand (hyperthermic, uncoated Typic Quartzipsamments) of the Central Florida Ridge. Variation of an...

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...

2014
Rajni Sharma

Agriculture is an economic activity that manifests the complex relationship between natural and human resources. The growth of agriculture is prerequisite for overall development of Indian economy. It contributes significantly to the export earnings and affects the performance of other sectors of the economy through forward and backward linkages. The present paper analysis disparities in agricu...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2007
Céline Bonfils David Lobell

Understanding the influence of past land use changes on climate is needed to improve regional projections of future climate change and inform debates about the tradeoffs associated with land use decisions. The effects of rapid expansion of irrigated area in the 20th century has remained unclear relative to other land use changes, such as urbanization, that affected a similar total land area. Us...

Journal: :Remote Sensing 2010
Prasad S. Thenkabail Munir A. Hanjra Venkateswarlu Dheeravath Muralikrishna Gumma

This paper presents an exhaustive review of global croplands and their water use, for the end of last millennium, mapped using remote sensing and non-remote sensing approaches by world’s leading researchers on the subject. A comparison at country scale of global cropland area estimated by these studies had a high R-value of 0.89–0.94. The global cropland area estimates amongst different studies...

Journal: :Bulletin de la Societe de pathologie exotique 2012
J Atangana A Fomena J Lebel Tamesse E Fondjo

We have comparatively studied the dynamics of malaria transmission in the villages of Mokolo-Douvar located in the rural area with traditional agriculture and Gounougou irrigated rice area, in 2004 August and November and 2006 May and October, to assess vectors biting habits, and malaria inoculation rate and malaria parasite prevalence in cohort of children from 0 to 15 years. Mosquitoes were c...

2015
C. H. Wang

In recent years the cultural landscape has become an important issue for cultural heritages throughout the world. It represents the "combined works of nature and of man" designated in Article 1 of the World Heritage Convention. When a landscape has a cultural heritage value, important features should be marked and mapped through the delimitation of a conservation area, which may be essential fo...

Journal: :Remote Sensing 2017
Eric W. Chance Kelly M. Cobourn Valerie A. Thomas Blaine C. Dawson Alejandro N. Flores

There are pressing concerns about the interplay between agricultural productivity, water demand, and water availability in semi-arid to arid regions of the world. Currently, irrigated agriculture is the dominant water user in these regions and is estimated to consume approximately 80% of the world’s diverted freshwater resources. We develop an improved irrigated land-use mapping algorithm that ...

2015
Isaac GARRIDO-BENAVENT Esteve LLOP Antonio GÓMEZ-BOLEA

For a long time, agriculture and recurrent fires have been the main factors promoting diversity changes in Mediterranean areas. We examined the effect of irrigated and non-irrigated crops and fires on the epiphytic lichen diversity of holm oak trees in the Vall d’Albaida region (Valencia, Spain). Lichen diversity was studied by calculating the LDV (Lichen Diversity Value) and the proportion of ...

2017
Eric W. Chance Kelly M. Cobourn Valerie A. Thomas Blaine C. Dawson Alejandro N. Flores Prasad S. Thenkabail

There are pressing concerns about the interplay between agricultural productivity, water demand, and water availability in semi-arid to arid regions of the world. Currently, irrigated agriculture is the dominant water user in these regions and is estimated to consume approximately 80% of the world’s diverted freshwater resources. We develop an improved irrigated land-use mapping algorithm that ...

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