نتایج جستجو برای: keywordscombination method evapotranspiration garliclysimeter

تعداد نتایج: 1635927  

ژورنال: علوم آب و خاک 2015
ساسانی, فاطمه , قمرنیا, هوشنگ ,

The SIMDualKc model is an irrigation scheduling simulation model that uses dual crop coefficient method for estimating ETc by computing two separate soil water balances in daily time-step, one for the soil evaporation layer from which Ke is computed, and the other one for the entire root zone to compute the actual Kcb adjusted to the soil moisture conditions. In this study, lysimetric measureme...

ژورنال: علوم آب و خاک 2019

In recent years, a lot of research has been done on the Aquacrop model, the results show that this model simulates the product performance for deficit irrigation conditions. But this model, like other models, is sensitive to values of independent variables (model inputs). In this research, the sensitivity of the Aquacrop model was analyzed for 4 input parameters of reference evapotranspiration,...

Ayat Rohina, Ayob Bahranifard Mohammad Karami Mohsen Dehghan

Sensitivity analysis to determine variations in evapotranspiration is much important considering a known variation in one of climatic variables. In this study, sensitivity of evapotranspiration from Penmann-Mantith, Penmann-Kimberly (1996), Penman-Kimberly (1972) and Penmann (1984)  and Hargrivs (1985) approaches to three climatic variations (maximum temperature, wind speed, solar radiation) wa...

2004
Richard G. Allen Luis S. Pereira Martin Smith Dirk Raes James L. Wright

Crop coefficient curves provide simple, reproducible means to estimate crop evapotranspiration (ET) from weather-based reference ET values. The dual crop coefficient sKcd method of the Food and Agricultural Organization of the United States (FAO) Irrigation and Drainage Paper No. 56 (FAO-56) is intended to improve daily simulation of crop ET by considering separately the contribution of evapora...

2016
Long Wan Jing Tong Jinxing Zhou Hongyan Guo Ming Cui Yuguo Liu Like Ning Fukai Tang

Over the past several decades, rocky desertification has led to severe ecological problems in karst areas in South China. After a rocky desertification treatment project was completed, the vegetation coverage changed greatly and, consequently, increased the ecology water consumption (approximately equal to the actual evapotranspiration) of the regional vegetation. Thus, it intensified the regio...

2012
M Vijay Shankar C. S. P. Ojha K. S. Hari Prasad

Maize and Indian mustard are significant crops in semi-arid climate zones of India. Improved water management requires precise scheduling of irrigation, which in turn requires an accurate computation of daily crop evapotranspiration (ETc). Daily crop evapotranspiration comes as a product of reference evapotranspiration (ET0) and the growth stage specific crop coefficients modified for daily var...

2005
N. J. Potter L. Zhang P. C. D. Milly T. A. McMahon A. J. Jakeman

[1] An important factor controlling catchment-scale water balance is the seasonal variation of climate. The aim of this study is to investigate the effect of the seasonal distributions of water and energy, and their interactions with the soil moisture store, on mean annual water balance in Australia at catchment scales using a stochastic model of soil moisture balance with seasonally varying fo...

2012
Jinping Zhang Junfeng Zhang Qiting Zuo

Evapotranspiration is a central process of the hydrological cycle, and various water saving measures are based on it. However, there is little research work on evapotranspiration in the world. In particular, there is rare hydrological cycle-based research on the impact of channel lining on evapotranspiration in arid and semi-arid regions. This paper applies a hydrological cycle model to examine...

Ayat Rohina, Ayob Bahranifard Mohammad Karami Mohsen Dehghan

Sensitivity analysis to determine variations in evapotranspiration is much important considering a known variation in one of climatic variables. In this study, sensitivity of evapotranspiration from Penmann-Mantith, Penmann-Kimberly (1996), Penman-Kimberly (1972) and Penmann (1984)  and Hargrivs (1985) approaches to three climatic variations (maximum temperature, wind speed, solar radiation) wa...

Journal: :Journal of Japan Society of Hydrology and Water Resources 1991

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