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Effects of multi-layering in a classical pumping test

To demonstrate several techniques for the analysis of pumping tests in confined aquifers Vedat Batu (1998) presents Example 4-6 on page 160–161 of his book «Aquifer Hydraulics». The pumping well (Q = 540 m3/d) and the two observation wells (r = 25 m and r = 75 m) are fully penetrating. Resulting transmissivities and storativities of the various methods are found between T = 174 and 260 m2/d, and between S = 0.000135 and S = 0.000666. All methods show a rather poor fit, mainly because the measured drawdown rate during the first 30 minutes is clearly higher than in the later period of the test. A much better fit can be obtained when the data of both observation wells are analyzed with the MLU software and a two-aquifer (analytical) model is used.

 
Життя без сміття і з чистою водою. Чим дивує приїжджих Чехія

Питна вода з-під крана, всі на велосипедах і відсутність поняття «сміття». Про те, що для українця – дивина, а для жителя невеличкого чеського міста – буденність, розповіла кореспонденту «СК» харківська науковиця Юлія Виставна.

 
Flow regime alteration due to anthropogenic and climatic changes in the Kangsabati River, India

According to the ‘natural flow paradigm’, any departure from the natural flow condition will alter the river ecosystem. Flow regimes have been modified by anthropogenic interventions and climate change is expected to cause additional impacts by altering precipitation extremes. This study aims to evaluate the observed hydrologic alteration caused by dam construction and simulate alteration due to expected climatic changes in a monsoon dominated mesoscale river basin in India. The paper by Neha Mittal, Ashok Mishra, Rajendra Singh, Ajay Gajanan Bhave and Michael van der Valk is now finally available to free.

 
Before the Flood

Before the Flood presents a riveting account of the dramatic changes now occurring around the world due to climate change. The film shows Leonardo DiCaprio visiting various regions of the globe exploring the impact of man-made global warming. As a narrator, DiCaprio comments these encounters as well as archive footages. DiCaprio repeatedly references a 15th-century triptych by Hieronymus Bosch, The Garden of Earthly Delights, which he uses as an analogy of the present course of the world toward potential ruin as depicted on its final panel. DiCaprio’s comments and inquiries focus extensively on climate change denial, mostly among corporate lobbyists and politicians of the United States.

 
UN top diplomat Sigrid Kaag awarded Carnegie Wateler Peace Prize

The Hague, 16 November 2016 • Today, Ms Sigrid Kaag, Dutch top diplomat working for the United Nations, received the Carnegie Wateler Peace Prize 2016 during an official ceremony at the Peace Palace. The Carnegie Foundation, which owns and manages the Peace Palace, has awarded this peace prize to Ms Kaag for her successful efforts in accomplishing sensitive and dangerous missions in the Middle East. The Board of the Carnegie Foundation lauded her dedication and personal approach. She is held in particularly high esteem for her ability to bring unity. The Chairman of the Foundation, Mr Bernard Bot, former Minister of Foreign Affairs of the Netherlands, commented her remarkable talent in bringing parties together and to consensus, adding that »Ms. Kaag does not think in problems, but encourages parties to act«.

 
Poyang, China’s largest freshwater lake, shrinks – a solution faces criticism

久负盛名的鄱阳湖是中国最大的淡水湖,夏日雨季时的面积达到洛杉矶的三倍以上。它是稀有的长江江豚的家园,在冬季,它的滩涂是成千上万鸟儿的首要觅食地,其中包括极度濒危的西伯利亚鹤,它们每年秋天飞向南方,逃离西伯利亚的寒流。现在鄱阳湖本身也处于濒危状态。

 
Images show that California’s reservoirs have shrunk

The ever increasing demand for freshwater has taken its toll, and California’s reservoirs are only at 46.4% of their capacity. Now, by using imagery provided by the Landsat 7 and Landsat 8 satellites, we can also see how the reservoirs have changed during the 21st century.

 
Iraq’s Mosul Dam is failing

The Mosul Dam is Iraq’s largest dam. It is failing. A breach would cause a colossal wave that could kill as many as a million and a half people. If the dam ruptured, it would likely cause a catastrophe of Biblical proportions, loosing a wave as high as a hundred feet that would roll down the Tigris, swallowing everything in its path for more than a hundred miles. Large parts of Mosul would be submerged in less than three hours. Along the riverbanks, towns and cities containing the heart of Iraq’s population would be flooded; in four days, a wave as high as sixteen feet would crash into Baghdad, a city of six million people.

 
2016 Christmas Appeal – INARA helps children when no one else can

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This Christmas, remind refugee families from Syria that there are people out there who care about them. For over five years now, we have watched the horrors of the Syrian War on our screens. We have watched families being torn apart, homes destroyed and left as rubble on the ground, and innocent children being injured and killed. It is very easy for you to watch this and feel as though there is nothing that you can do to help these people. But you can do something.

 
SnowHydro 2018 – International Conference on Snow Hydrology

12–15 February 2018, Heidelberg • SnowHydro 2018 – International Conference on Snow Hydrology. Snow is an important component of the hydrological cycle. The seasonal storage of water in the snowpack may last over months, and its retarded release is a major factor of reliable water supply for ecosystems and human needs during dry periods. Rapid snow melt can however cause destruction through sudden floods, mostly in combination with rainfall. Thus, water demanding downstream regions, settlements and infrastructures are highly vulnerable with regard to the presence or absence of snow in the headwaters. Increasing air temperatures and changing precipitation patterns driven by climate change will modify snow conditions and thus lead to changing water supplies. Snow cover is also a critical factor in global and regional energy balances. The consequences of reduced snow duration and an increasing share of rainfall on precipitation will completely change the land-atmosphere interactions and thus lead to further modifications of the regional climatic conditions.

 

 
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