The Min River is the largest river in Fujian Province southeastern China. construction of a series dams along upper reaches River, especially Shuikou Dam, which started filling 1993, modified flow processes at lower leading to significant increase low-flows and slightly decrease flood-flows. At same time, reservoirs have more effects on sediment transport process than by trapping most reservoir...

Check dams are one of the structures used to control debris flows. In this study, in order to evaluate the effect of hydraulic parameters on debris sediment trapping rate by the slit trapezoidal check dams with different angles, and to develop an empirical relation for determination of trapping coefficient of the dam reservoirs, three physical models of the check dams were used. The tests were ...

All over the world, dam managers are constantly confronted with siltation of reservoirs. This natural phenomenon represents a menace to safety dam; because sediments deposited amplifies load applied and shut off dam’s bottom outlet. It also reduces usable capacity reservoir degrades quality water stored (pollution, eutrophication, turbidity, etc.). In arid semi-arid countries like Morocco, de-s...

Abstract. With rapid population growth and socioeconomic development over the last century, a great number of dams/reservoirs have been constructed globally to meet various needs. China has strong economical societal demands for constructing dams reservoirs. The official statistics reported more than 98 000 in China, including nearly 40 % world's largest dams. Despite availability several globa...

BACKGROUND Reservoirs created by damming rivers are often believed to increase malaria incidence risk and/or stretch the period of malaria transmission. In this paper, we report the effects of a mega hydropower dam on P. falciparum malaria incidence in Ethiopia. METHODS A longitudinal cohort study was conducted over a period of 2 years to determine Plasmodium falciparum malaria incidence amon...

This paper was motivated by the 25th anniversary of the publication of Marc Reisner's book, Cadillac Desert: The American West and its Disappearing Water. Dams are ubiquitous on rivers in the United States, and large dams and storage reservoirs are the hallmark of western U.S. riverscapes. The effects of dams on downstream river ecosystems have attracted much attention and are encapsulated in t...

In this article we wish to evaluate efficiency of use of Dnieper cascade hydropower plants on the basis of common approaches to environmental management. We evaluate the efficiency of use the flooded areas of the hydropower station in agriculture. Assessment of the man-made risks includes evaluation of static (regular maintenance of dams) and stochastic (probability of artificial tsunami) compo...

The geochemical processes of mercury in Dongfeng (DF) and Wujiangdu (WJD) reservoirs, which were constructed in 1992 and 1979, respectively in Wujiang River, which is the upper branch of Yangtze River were investigated. One sampling site was chosen up river of 1 km from the dam for each reservoir. Three sampling campaigns were conducted at these sampling sites in December 2003, April 2004 and J...

Hydroelectric reservoirs have environmental impacts as many other sources of energy. Regarding hydropower, these effects include flooding cultivated and forest areas, changes in water quality, negative on biodiversity, conflict with indigenous people fish migration. In the nineties, researchers put evidence another important impact dam construction: greenhouse gases generated by organic matter ...