نتایج جستجو برای: potential evapotranspiration

تعداد نتایج: 1073205  

Journal: :Water Resources Research 2023

The quality of precipitation (P) and potential evapotranspiration (PET) data greatly affects the hydrological modeling performance. Considerable attention has been paid to identifying influence biased P or PET inputs independently. However, few studies have explored joint interaction biases in on simulations. Here, we investigate mutual compensation performance two widely used conceptual models...

اسلامیان, سید سعید , زارعیان, محمدجواد, عابدی کوپایی, جهانگیر ,

Abstract Knowing crop evapotranspiration at any time is very important in management of irrigation systems for greenhouse. Changes in evapotranspiration during the crop growth period are described by crop coefficient (Kc), which is defined as the ratio between crop evapotranspiration and reference evapotranspiration. This study was conducted to determine the evapotranspiration of cucumber, tom...

1999
Kell B. Wilson Dennis D. Baldocchi

The components of the surface energy balance were measured for 3 years over a broadleaved deciduous forest using the eddy covariance technique. Within years, the magnitude and distribution of fluxes was controlled by seasonal changes in solar radiation, drought, as well as leaf emergence and senescence. Evapotranspiration increased by a factor greater than five (from about 0.5 to 3 mm day−1) af...

Journal: :آب و خاک 0
سید سجاد رضوی کهنمویی کامران داوری بیژن قهرمان علی نقی ضیائی عزیزالله ایزدی کاظم اسحاقیان مهری شاهدی

limitation of water resources in iran motivates sustaining and preserving of the resources in order to supply future water needs. fulfilling these objectives will not be possible unless having accurate water balance of watersheds. the purpose of this study is to estimate the water balance parameters using a distributed method. the large number of distributed models and methods was studied and “...

2009
Corinne A. Barker Brian D. Amiro Hyojung Kwon Brent E. Ewers Julia L. Angstmann

The Canadian boreal forest consists of a mosaic of landscapes of varying soil drainage and forest age driven by wildfire. The hydrological consequences are complicated by plant responses to soil moisture and forest age, both potentially influencing evapotranspiration. Evapotranspiration was measured using the energy balance residual technique in 2006 and 2007 at forested upland and fen sites th...

Journal: :Hydrological Processes 2022

Evapotranspiration is a critical component of the water balance catchment, and riparian zones play crucial role in hydrological process. However, influence on evapotranspiration, especially at catchment scale, needs more investigation. Since evapotranspiration negligible night, difference recharge between day night generates diurnal fluctuations streamflows. A new method developed to estimate b...

2010
Abdelghani Chehbouni

This paper develops two different approaches for downscaling (disaggregation) passive microwave derived soil moisture from coarse resolution L-band observations. Ground and airborne data collected over Walnut Gulch experimental watershed during the Monsoon ’90 experiment were used to test these approaches. These data consisted of eight micrometeorological stations (METFLUX) and six flights of t...

2008
A. Bahremand F. De Smedt

The spatially distributed hydrologic model WetSpa is applied to the Torysa river basin (1,297 km) located in Slovakia. Daily hydrometeorological data from 1991 to 2000 are used as input to the model. The spatial characteristic of the basin are described by three base maps, i.e. DEM, landuse and soil type, in GIS form using 100 m cell size. Results of the simulations show a good agreement betwee...

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