نتایج جستجو برای: cropwat
تعداد نتایج: 197 فیلتر نتایج به سال:
Water scarcity and water quality degradation are exacerbated by climate change in all countries, including Pakistan. The use of agriculture is one the most predominant resources, so reducing consumption improving resource management utmost importance. In past few decades, excessive irrigation has led to severe reduced quality. This study determined requirements for cotton, rice, wheat, using CR...
The following method was used to apply the topology of current study evapotranspiration ETo, net irrigation demand, schedules, and total effective rain fall different crop models: using Food Agriculture Organization's (FAO) CROPWAT 8.0 standard software CLIMWAT 2.0 tool FAO-56 Penman-Monteith approach examine variable ETo. Due high temperatures in summer with an annual mean 6.33 mm/day, topolog...
Estimating crop evapotranspiration is vital for the calculation of irrigation water requirements. Remote sensing data have proven to be a valuable and efficient tool estimating evapotranspiration. It has been used intensively over past decade due free, high temporal spectral resolution availability. The main aim this study was estimate (ET) selected area in El-Beheira governorate, Egypt based o...
Abstract Remote sensing techniques are currently used in different fields including irrigation and water management fields. One of the important is calculation consumption (WC). can be to estimate actual evapotranspiration it also crop coefficients based on spectral reflectance vegetation indices (VIs), from a relation with normalized difference index (NDVI), which an indicator for absorption r...
Climate change is changing global weather patterns, with an increase in droughts expected to impact crop yields due water scarcity. Crops can be provided via underground pumping systems mitigate shortages. However, the energy required pump tends expensive and hazardous environment. This paper explores different sites Sudan assess requirements as first stage of developing renewable sources based...
The mean water releases at head section of 11 years Nagarjuna Sagar Jawahar right main Canal, Andhra Pradesh, India is found to be 128.13 TMC (3,627.71 MCM). surface availability was estimated as 2,229 MCM. For the efficient utilization groundwater, quality plays a major role in terms selection crop variety for sustainable agriculture. ground quantity command area available 1385 MCM and annual ...
This study aims to project the compound impacts of climate change and human activities, including agriculture expansion hydropower generation, on future water availability in Sre Pok River Basin. The five regional models (RCMs): ACESS, REMO2009, MPI, NorESM, CNRM were selected for projection under two scenarios, i.e., RCP 4.5 8.5. Our results reveal that annual rainfall is expected decrease by ...
محدودیت های فعلی در منابع آبی قابل دسترس به ویژه برای استفاده در بخش کشاورزی نشان می دهد که توجه بیش تر به مدیریت آب آبیاری غیر قابل اجتناب است. کم آبیاری به عملیاتی گفته می شود که برای بهبود استفاده از واحد حجم آب انجام می گیرد. در این تحقیق کارایی مدل cropwat 8.0 در مقابل داده های مزرعه سویا (که تحت مدیریت کم آبیاری قرار گرفته بود) ارزیابی شد. این آزمایش در سالهای زراعی 88-1387 و 89-1388 در ...
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