نتایج جستجو برای: drylands water use

تعداد نتایج: 2220891  

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه شیراز - دانشکده علوم 1392

gol-e-gohar iron ore mine of sirjan in southern part of iran is a large open pit that operates below the groundwater table and during mining operation, dewatering is required to prevent operation processes from flooding. current operation is going on by digging wells in or out of the pit and pumping to prevent flooding. as a result of the former dewatering operation a vast deep cone of depressi...

Journal: :Landscape Ecology 2022

Abstract Context Effectively estimating the influences of urban expansion on multiple ecosystem services (ESs) is great importance for improving planning in drylands. However, there are some shortcomings existing models, which lead to uncertainties assessment ESs. Objectives This study sought effectively estimate ESs Methods We combined land use scenario dynamics-urban model and ES models habit...

2011
Mulugeta Lemenih Habtemariam Kassa

Any views expressed in this publication are those of the authors. They do not necessarily represent the views of CIFOR, the authors' institutions or the financial sponsors of this publication. Contents Abbreviations vi Acknowledgements vii Foreword viii 1 Challenges and forest-based opportunities in the drylands of Ethiopia 1 1.1 Drylands of Ethiopia 1 1.2 Challenges facing the drylands of Ethi...

Journal: :Nature Climate Change 2021

Global warming alters surface water availability (precipitation minus evapotranspiration, P–E) and hence freshwater resources. However, the influence of land–atmosphere feedbacks on future P–E changes underlying mechanisms remain unclear. Here we demonstrate that soil moisture (SM) strongly impacts changes, especially in drylands, by regulating evapotranspiration atmospheric inflow. Using model...

2013
Liping Li Zhiheng Wang Stefan Zerbe Nurbay Abdusalih Zhiyao Tang Ming Ma Linke Yin Anwar Mohammat Wenxuan Han Jingyun Fang

Dryland ecosystems are highly vulnerable to climatic and land-use changes, while the mechanisms underlying patterns of dryland species richness are still elusive. With distributions of 3637 native vascular plants, 154 mammals, and 425 birds in Xinjiang, China, we tested the water-energy dynamics hypothesis for species richness patterns in Central Asian drylands. Our results supported the water-...

Journal: :International Journal of Enviornment and Climate Change 2023

The scope for enhancement of productivity under irrigated conditions is limited due to over-exploitation available resources However, there ample opportunity boosting yield in drylands by adopting suitable crops and cropping systems. agricultural sustainability comparatively hard achieve different constraints like poor soil fertility, lack irrigation facilities moisture stress, small holdings l...

Journal: :Proceedings of the National Academy of Sciences of the United States of America 2007
Margarita Caso Charlotte González-Abraham Exequiel Ezcurra

Precipitation pulses are essential for the regeneration of drylands and have been shown to be related to oceanographic anomalies. However, whereas some studies report increased precipitation in drylands in northern Mexico during El Niño years, others report increased drought in the southern drylands. To elucidate the effect of oceanographic/atmospheric anomalies on moisture pulses along the who...

Journal: :Science of The Total Environment 2021

Links between water and carbon (C) cycles in drylands are strongly regulated by biocrusts. These widespread communities the intershrub spaces of able to use non-rainfall inputs (NRWI) (fog, dewfall vapour) become active fix dioxide (CO2), converting biocrusts into main soil C contributors during periods which vegetation remains inactive. In this study, we first evaluated influence biocrust type...

جلیل اصغری میدانی خشنود علیزاده دیزج علیرضا فخرواعظی, فرهاد آهک‌پز محسن مهدیه مقصود حسن پورحسنی

    Drylands cover about 6.2 million hectares of arable lands across Iran, but annual feed legumes are not present in rainfed crop rotations. Introduction of new forage cultivars with high productivity and nutritive values is a key solution in drylands development. Vd-2446 a vetch (Vicia dasycarpa) line with origin of Italy has been selected from vetch nurseries provided by ICARDA during 1995 a...

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