Investigation of Culvert According to Fish-Passage
Journal Title: Caspian Journal of Applied Sciences Research - Year 2012, Vol 1, Issue 8
Abstract
This study was conducted to investigate and compare the existence cross drainage with its standards in forest regions of Savad kooh, Iran. Research was done according to the importance of the planning issue of technical structures in forest roads based on wildlife habitat. In order to assess the characteristics of the considered ravine different analysis was respectively carried out to achieve flow direction, flow length, cumulate center and flow rate. The Roadeng software, which has been produced for the road construction project, was used to design existent road, streams and culvert in our study area. In this software, the level of water depth in the culvert is determined with a combination of topographic layers, ravine properties (length, direction, flow intensity and catchment area) and status of culvert installation. A result of investigations in study area showed that skew of mounted culverts is not accordance to flow direction. So that, when the culverts’ causes to skew water flow from its main route it can be a barrier against aquatic migration. In this study, the culvert had suitable status in viewpoint of gradient and water level (suitable depth for fish passage). So that, this issue causes to even level flow and balance a long culvert. According to the results of this study, it can be concluded that the correct installation of culverts in forest roads needed accurate scientific studies in the field of road engineering, forest and fishing.
Authors and Affiliations
Mehran Nasiri, Seyed Ataollah Hosseini, Majid Lotfalian, Ataollah Kavian
Keywords
Related Articles
- EP ID EP108786
- DOI -
- Views 106
- Downloads 0
The Genesis of Sexual Function Disorders due to Organic Causes in End-Stage Renal Disease Patients under Hemodialysis
Sexual function disorders (SFD) are common among End-Stage Renal Disease (ESRD) patients undergoing hemodialysis treatment. The dysfunction of sexual activity in the patients group is a multi-factorial phenomenon....
The Measurements of Radon Concentration and Thoron to Radon Ratio in Soil Gas in the Environs of Al-Kufa City-Iraq
Soil gas Radon ( ) and Thoron ( ) concentrations were measured at 20 locations in the Kufa city (Iraq), using RAD7 radon monitoring system of Durridge company USA. In each location four different depths were taken...
Reduction of Faecal Indicators and Elimination of Pathogens from Sewage Treated Effluents by Heat Treatment
Different pathogens may be found in the sewage treated effluents generated by sewage treatment plants (STPs). The United States Environmental Protection Agency (U.S. EPA) regulations have established pathogen reduc...
Semi-invariant -Submanifolds of trans-Sasakian Manifolds
This paper is devoted to the study of a semi-invariant –submanifolds of trans-Sasakian manifold. Further we investigated the integrability of the distribution defined by this submanifold. An addition, some results are...
Destructive Effect of Silver Nanoparticles on Biocontrol Agent Fungi Trichoderma viride and T. harzianum
Trichoderma spp. serves as biocontrol and growth promoting agents for many crop plants due to their antagonistic properties against plant pathogens. Nanoparticles have become of an interest relatively recently, mos...