نتایج جستجو برای: fresh water

تعداد نتایج: 596009  

2006
Willem P. Sijp Matthew H. England

We show that a reduction in vertical mixing applied inside the Atlantic basin can drastically increase North Antlantic Deep Water (NADW) stability with respect to fresh water perturbations applied to the North Atlantic. This is contrary to the notion that the stability of the ocean’s thermohaline circulation simply scales with vertical mixing rates. An Antarctic Intermediate Water (AAIW) revers...

پایان نامه :وزارت علوم، تحقیقات و فناوری - دانشگاه خلیج فارس - دانشکده مهندسی 1393

in civil engineering concrete is a material combined of hydraulic cement, sand, gravel and water. gravel and sand compose 60 to 70 percent of concrete. these aggregates support compression force of concrete. cement paste acts as glue to stick grain together. in bushehr factories producing aggregates do not operate according to astm standards, so that fineness modulus (fm) of the produced sands ...

Journal: :Science 2012
Stanley B Grant Jean-Daniel Saphores David L Feldman Andrew J Hamilton Tim D Fletcher Perran L M Cook Michael Stewardson Brett F Sanders Lisa A Levin Richard F Ambrose Ana Deletic Rebekah Brown Sunny C Jiang Diego Rosso William J Cooper Ivan Marusic

Humans create vast quantities of wastewater through inefficiencies and poor management of water systems. The wasting of water poses sustainability challenges, depletes energy reserves, and undermines human water security and ecosystem health. Here we review emerging approaches for reusing wastewater and minimizing its generation. These complementary options make the most of scarce freshwater re...

Journal: :Journal of the American Mosquito Control Association 1987
R E McLaughlin M F Vidrine O R Willis

This study, conducted in 3 parishes of Louisiana, documented the distribution pattern of Anopheles quadrimaculatus and An. crucians during the first crop season. Ratios of numbers of 3rd and 4th instar larvae of An. quadrimaculatus to the number of An. crucians 3rd and 4th instar larvae (Q/C), varied both spatially and temporally. The mean Q/C ratio during 1984 was 1.37; during 1985 it was 1.40...

2015
M. S. Yun T. E. Whitledge D. Stockwell J. H. Lee J. W. Park D. B. Lee J. Park

Journal: :Ambio 2012
Otto Klemm Robert S Schemenauer Anne Lummerich Pilar Cereceda Victoria Marzol David Corell Johan van Heerden Dirk Reinhard Tseggai Gherezghiher Jana Olivier Pablo Osses Jamal Sarsour Ernst Frost María J Estrela José A Valiente Gebregiorgis Mussie Fessehaye

The collection of fog water is a simple and sustainable technology to obtain fresh water for afforestation, gardening, and as a drinking water source for human and animal consumption. In regions where fresh water is sparse and fog frequently occurs, it is feasible to set up a passive mesh system for fog water collection. The mesh is directly exposed to the atmosphere, and the foggy air is pushe...

2012
N. B. Narasimha Prasad

One of the main problems experienced by the islanders of Lakshadweep is associated with the availability of fresh water for drinking purpose. The scarcity of fresh water is due to the peculiar hydrologic, geologic, geomorphic and demographic features. Proper understanding of the groundwater condition, in terms of availability, distribution and quality, is very important to meet the increasing d...

2014
Yong-Sik Cho

The behaviors of the water body of Dongbin Harbor located at Pohang City, Gyongpook Province, in Korea were numerically simulated in this study. A canal was planned to connect the harbor and the Hyeongsan River to improve water quality inside the harbor. The current system was first simulated by using a commercial program RMA2, with respect to both tidal currents and river flow. The progress in...

2016
Liang Yi Chenglong Deng Lizhu Tian Xingyong Xu Xingyu Jiang Xiaoke Qiang Huafeng Qin Junyi Ge Guangquan Chen Qiao Su Yanping Chen Xuefa Shi Qiang Xie Hongjun Yu Rixiang Zhu

The Bohai Basin was transformed to an inner shelf sea hundreds of thousands years ago. This youngest land-sea transition participated in the significant modification of the distribution of fresh water, sediment fluxes and climate in East Asia, and played an important role in the origin of the Asian marginal seas. Here we present the results of a magnetostratigraphic investigation and propose a ...

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