نتایج جستجو برای: today as freshwater resources become scarcer

تعداد نتایج: 5870903  

2011
Matti Kummu Hans de Moel Philip J. Ward Olli Varis

Traditionally, people have inhabited places with ready access to fresh water. Today, over 50% of the global population lives in urban areas, and water can be directed via tens of kilometres of pipelines. Still, however, a large part of the world's population is directly dependent on access to natural freshwater sources. So how are inhabited places related to the location of freshwater bodies to...

Journal: :Journal of Statistical Mechanics: Theory and Experiment 2013

2006
David A. Bearden

ighly capable small satellites are commonplace today, but this wasn’t always the case. It wasn’t until the late 1980s that modern small satellites came on the scene. This new breed of low-profile, low-cost space system was built by maximizing the use of existing components and off-the-shelf technology and minimizing developmental efforts. At the time, many thought that because of their function...

Journal: :Northern Journal of Applied Forestry 1996

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه پیام نور - دانشگاه پیام نور استان تهران - دانشکده علوم اجتماعی و اقتصادی 1389

abstract nowadays, the science of decision making has been paid to more attention due to the complexity of the problems of suppliers selection. as known, one of the efficient tools in economic and human resources development is the extension of communication networks in developing countries. so, the proper selection of suppliers of tc equipments is of concern very much. in this study, a ...

Journal: :Legume science 2023

Dual use crops are becoming popular as resources like land and water become scarcer. Annual peanuts an important food crop grown worldwide that can also be used forage or hay. Replicated trials evaluated the late season (≥15 weeks after planting) accumulations nutritive values (acid detergent fiber, carbon content, crude protein, invitro true digestibility, neutral nitrogen relative feed value)...

Journal: :Wetlands 2022

Abstract Many regions of the world are facing mounting water stress as competition increases for this vital resource that may become scarcer under future climates. More is being allocated to our needs food, public supply, hydro-electric power and industrial goods support growing populations life-style expectations. To achieve this, less often retained water-dependent ecosystems. Environmental p...

2009

Fisheries • vol 34 no 11 • november 2009 • www.fisheries.org ABStrACt: Anthropogenic effects including river regulation, watershed development, contamination, and fish introductions have substantially affected the majority of freshwater habitats in Europe and north America. This pattern of resource development and degradation is widespread in the tropics, and often little is known about the res...

The phenomenon of climate change is the greatest environmental challenge facing in the world today. The phenomenon is expected to affect all ecosystems in the world. Freshwater ecosystems are more vulnerable to these changes, as freshwater is exposed to various human pressures such as hydrology, morphology, connectivity and water quality. Therefore, climate change along with the mentioned issue...

2009

Fisheries ABSTRACT: Anthropogenic effects including river regulation, watershed development, contamination, and fish introductions have substantially affected the majority of freshwater habitats in Europe and North America. This pattern of resource development and degradation is widespread in the tropics, and often little is known about the resources before they are lost. This article describes...

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