Scientific Research Publishing

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53700#.VNBnryzQrzE Author(s)    Ramandeep S. Sidhu 1* , Mark Dougherty 1 , Wesley C. Zech 2 , Beth Guertal 3   Affiliation(s) 1 Department of Biosystems Engineering, Auburn University, Auburn, USA . 2 Department of Civil Engineering, Auburn University, Auburn, USA . 3 Department of Crop, Soils and Environmental Sciences, Auburn University, Auburn, USA . ABSTRACT The main goal of this study was to quantify reduction of runoff responses using selected erosion control covers on 1.2 m × 0.6 m plots under simulated rainfall to determine the most cost-effective temporary cover treatment under similar soils, rainfall and embankment slope conditions. The different erosion control covers tested were polyacrylamide (PAM), wheat straw and PAM (WS + P) with and without seed; and engineered fiber matrix (EFM) with and without seed. The EFM + S and WS + P + S tr...

Read  full  paper  at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=53689#.VM83PCzQrzE Author(s)     Serap Pulatsü , Akasya Topçu *   Affiliation(s) Department of Aquaculture and Fisheries Engineering, Agricultural Faculty, Ankara University, Ankara, Turkey . ABSTRACT Turkey’s inland water ecosystem consists of 33 rivers (177.714 miles), 200 natural lakes (906.118 ha), 159 reservoirs (342.377 ha) and 750 ponds (15.500 ha). Sedimentological studies conducted on inland water ecosystems during the last 15 years in Turkey can be categorized into two main topics. The first group of studies is concerned with heavy metal levels in sediment, with especial reference to the interaction between water, sediment and aquatic organisms. Additionally, the studies in question deal with the potential impacts of heavy metal concentrations on the ecosystem. The second group of studies is concerned with the role of eutrophicatio...

Read full paper at: http://www.scirp.org/journal/PaperInformation.aspx?PaperID=52365#.VJOAUcCAM4 Author(s)   Zhongfan Zhu Affiliation(s) College of Water Sciences, Beijing Normal University, Beijing, China . ABSTRACT Investigation on flocculation phenomenon of cohesive fine-grained sediment has been a important part of sediment dynamics. During all of three dynamical factors (i.e., Brownian motion, flow shear and differential settling) that have been verified to play important roles in promoting flocculation of cohesive sediment, the influence of flow shear on sediment flocculation has been paid great attention by many researchers (this flocculation pattern has been termed as “orthokinetic flocculation” in m...