in this study gill-net selectivity for alburnus chalcoides inhabiting the almus dam lake was estimated. experimental gill-net fishing was conducted using gill-net with 15 mm and 20 mm mesh-size, during october 2002 and september 2003. a total of 254 and 198 specimens of a. chalcoides were caught by gill-net with 15 mm and 198 with the 20 mm mesh-size, respectively. the total length of the fish ...

shahrechay dam is located at 12th km of shahrechay river in urmia. this study was conducted for a year (spring to fall, 2007) to identify different species of benthic organisms in the dam. considering the relevant topographic status like the local depth and water speed, 6 sampling stations were chosen and sampling was done in shallow locations of the river by means of superficial method. in thi...

[1] Lakes impounded by moraines may be considered hazardous in glaciated areas throughout the world because dams can fail suddenly producing destructive floods with peak discharges far in excess of normal flows. Here we present a comprehensive case study in the Zurich, Switzerland, area that reveals several independent lines of evidences for the occurrence of a Late Pleistocene ( 13,760 calibra...

The paper reports on the flora along the banks of Lake Nubia and the long-term changes that have taken place since the formation of the Aswan High Dam (AHD) Lake about 40 years ago. Both aquatic and shoreline vegetation were studied in 15 transects located across the lake, from Debeira (337.5 km south of the Aswan High Dam), to the Dal Cataract (500 km south of AHD). Water temperature, pH, diss...

Diatoms samples in Zayandeh Rood Dam Lake were taken in four stations from surface, 0.5 and 3 m depths of water in three replicate by Nansen sampler. Additional samples were taken from the surface with plankton net. Diatoms samples fixed with 4% formaldehyde and were concentrated and identified using microscope at 400 x. Salinity, NO3, PO4 and SO4 were measured using standard methods (APHA). In...

This study aimed to determine the species composition of two algal associations in Karakaya Dam Lake. For this purpose, monthly variations phytoplankton and seasonally epipelic algae occurring dam lake were studied between June 2010 May 2011. Five stations selected A total 38 taxa belonging Bacillariophyta (27 taxa), Charophyta (2 Chlorophyta (3 Cyanobacteria Miozoa taxa) Ochrophyta (1 taxon) i...

Plastic has become one of the most prominent contaminants in recent decades, posing a major environmental threat with critical implications for seafood safety. Thus, we investigated abundance and characterization microplastics (MPs) sediment bivalves from Çıldır Lake, Almus Dam Kartalkaya Lake Turkey. The MPs ranged 19-156 MP kg$^{-1}$ sediments, while 0.75-10.0 individual$^{-1}$ (indiv.$^{-1}$...

Optimized forest degradation model (OFDM): an environmental decision support system for environmental impact assessment using an artificial neural network Ali Jahani, Jahangir Feghhi, Majid F. Makhdoum & Mahmoud Omid a Environment and Natural Resources Sciences Department, University of Environment, Karaj, Iran b Department of Forestry and Forest Economic, Faculty of Natural Resources, Universi...

Presenting water quality data for stakeholder meetings is often challenging. Section 603 of the Energy Act requires dam owners to hold stakeholder meetings on lake water quality issues during the FERC re-licensing process. Traditionally, maps, tables, and graphs have been distributed at stakeholder meetings to present water quality data, which is often perceived as misleading and confusing. Thi...