نتایج جستجو برای: monthly water balance

تعداد نتایج: 707130  

Journal: :Remote Sensing 2016
Galo Carrillo-Rojas Brenner Silva Mario Córdova Rolando Célleri Jörg Bendix

Understanding of evapotranspiration (ET) processes over Andean mountain environments is crucial, particularly due to the importance of these regions to deliver water-related ecosystem services. In this context, the detection of spatio-temporal changes in ET remains poorly investigated for specific Andean ecosystems, like the páramo. To overcome this lack of knowledge, we implemented the energy-...

2011
Gabriel J. Bowen Casey D. Kennedy Zhongfang Liu Jeremy Stalker

[1] The stable H and O isotope composition of river and stream water records information on runoff sources and land‐atmosphere water fluxes within the catchment and is a potentially powerful tool for network‐based monitoring of ecohydrological systems. Process‐based hydrological models, however, have thus far shown limited power to replicate observed large‐scale variation in U.S. surface water ...

Journal: :J. Geographic Information System 2011
Abdelhamid Fadil Hassan Rhinane Abdelhadi Kaoukaya Youness Kharchaf Omar Alami Bachir

The study of water resources at watershed scale is widely adopted as approach to manage, assess and simulate these important natural resources. The development of remote sensing and GIS techniques has allowed the use of spatially and physically based hydrologic models to simulate as simply and realistically as possible the functioning of watershed systems. Indeed, the major constraint that has ...

2012
KISHAN SINGH RAWAT ANIL KUMAR MISHRA GEORGE PAUL RAKESH KUMAR

The present research work was undertaken to estimate the ground water recharge in Shankergarh block, Allahabad (India) during the year 2008. The data set used consisted of satellite derived rainfall and actual evapotranspiration and SCS-CN model estimated runoff values. The monthly values of the different components of water balance equation were estimated and subsequently the ground water rech...

2004
Brent R. Helliker Joseph A. Berry Alan K. Betts Peter S. Bakwin Kenneth J. Davis A. Scott Denning James R. Ehleringer John B. Miller Martha P. Butler Daniel M. Ricciuto

[1] Convective turbulence within the atmospheric boundary layer (ABL) and movement of the ABL over the surface results in a large spatial (10–10 km) integration of surface fluxes that affects the CO2 and water vapor mixing ratios. We apply quasi-equilibrium concepts for the terrestrial ABL to measurements of CO2 and water vapor made within the ABL from a tall tower (396 m) in Wisconsin. We supp...

2001
P. B. Anand

The main contributions of the paper can be divided into five areas. (a) It tries to explain conceptually, the institutional arrangements for water supply in Chennai and whether the state government’s decision about improving the performance of the water utility depends on particular political circumstances. A plausible explanation is also given of the impact of ground water regulation on the su...

Journal: :Ground water 2005
Jozsef Szilagyi F Edwin Harvey Jerry F Ayers

Naturally occurring long-term mean annual recharge to ground water in Nebraska was estimated by a novel water-balance approach. This approach uses geographic information systems (GIS) layers of land cover, elevation of land and ground water surfaces, base recharge, and the recharge potential in combination with monthly climatic data. Long-term mean recharge > 140 mm per year was estimated in ea...

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