Procedures for Selection of Check Dam Site in Rainwater Harvesting

2018 ◽  
pp. 502-517
Keyword(s):  
Rainwater Harvesting ◽  
Check Dam ◽  
Dam Site ◽  
Selection Of

scholarly journals Torrential Flood Water Management: Rainwater Harvesting through Relation Based Dam Suitability Analysis and Quantification of Erosion Potential

2021 ◽  
Vol 10 (1) ◽  
pp. 27
Author(s):  
Bilal Ahmad Munir ◽  
Sajid Rashid Ahmad ◽  
Raja Rehan
Keyword(s):  
Sediment Yield ◽  
Soil Loss ◽  
Rainwater Harvesting ◽  
Suitability Analysis ◽  
Valley Bottom ◽  
The North ◽  
Roughness Index ◽  
Dam Site ◽  
Very High

In this study, a relation-based dam suitability analysis (RDSA) technique is developed to identify the most suitable sites for dams. The methodology focused on a group of the most important parameters/indicators (stream order, terrain roughness index, slope, multiresolution valley bottom flatness index, closed depression, valley depth, and downslope gradient difference) and their relation to the dam wall and reservoir suitability. Quantitative assessment results in an elevation-area-capacity (EAC) curve substantiating the capacity determination of selected sites. The methodology also incorporates the estimation of soil erosion (SE) using the Revised Universal Soil Loss Equation (RUSLE) model and sediment yield at the selected dam sites. The RDSA technique identifies two suitable dam sites (A and B) with a maximum collective capacity of approximately 1202 million m3. The RDSA technique was validated with the existing dam, Gomal-Zam, in the north of Sanghar catchment, where RDSA classified the Gomal-Zam Dam in a very high suitability class. The SE estimates show an average of 75 t-ha−1y−1 of soil loss occurs in the study area. The result shows approximately 298,073 and 318,000 tons of annual average sediment yield (SY) will feed the dam A and B respectively. The SE-based sediment yield substantiates the approximate life of Dam-A and Dam-B to be 87 and 90 years, respectively. The approach is dynamic and can be applied for any other location globally for dam site selection and SE estimation.

Water resource management with a combination of underground dam/qanat and site selection of suitable sites using GIS

2013 ◽  
Vol 13 (3) ◽  
pp. 606-614
Author(s):  
Masoomeh Alaibakhsh ◽  
Sh. Haji Azizi ◽  
M. M. Kheirkhah Zarkesh
Keyword(s):  
Resource Management ◽  
Water Resource ◽  
Site Selection ◽  
Water Resource Management ◽  
The World ◽  
Subsurface Dam ◽  
Dam Site ◽  
Local Use ◽  
Underground Dams ◽  
Selection Of

Subsurface dams and aqueducts have been used for many years as important sources of water in different parts of the world. Nowadays, little attention is paid to aqueducts. On the other hand, there is a great tendency for constructing and using subsurface dams in many arid and semiarid parts of the world such as Iran. A combination of these two structures was established in ancient Iran including Qanat Vazvan in Isfahan. Nowadays, new methods and techniques such as the Geographic Information System and Remote Sensing have been developed to process site selection of subsurface dams with high accuracy and in a short time. Study and research of the Qanat Vazvan structure emphasizes the idea that these two structures have been combined in a new way. Considering some main criteria and sub-criteria for subsurface dam site selection, with the existence of aqueduct, some suitable locations with a combination of aqueduct and subsurface dam in Pishkoh basin, Taft, Yazd province have been delineated. Some of the advantages of underground dams are their local use, being close to the demand sites and their capacity for gathering water in each season. These positive points when combined with reclamation of aqueducts (qanats) cause a renewable situation for qanats and their efficiency as a water resource management process. Underground dams can be built in a qanat's shaft by constructing some hatches inside the dam's wall. Hence, water can be stored during cold rainy seasons. The main and basic weaknesses of qanats can be covered through this combination. Hence, it causes a strong and optimum usage of qanat water.

Analysis of Application of Sediment Trap in Rivers as An Effort Reservoir Sedimentation Control

2021 ◽  
Vol 26 (2) ◽  
pp. 229-236
Author(s):  
Dyah Ari Wulandari ◽  
Desyta Ulfiana ◽  
Priyo Nugroho Parmantoro
Keyword(s):  
Sediment Trap ◽  
Sediment Load ◽  
Sediment Traps ◽  
Fine Sediment ◽  
Sediment Deposition ◽  
Reservoir Sedimentation ◽  
Check Dam ◽  
Fine Sediments ◽  
Irrigation Channels ◽  
Selection Of

Reservoir sedimentation can be overcome by reducing the amount of sediment that enters the reservoir, by building check dam. The check dam has more deposited coarse sediment load than fine sediment load. Fine sediment that escapes the check dam will flow further and eventually enter the reservoir pond. Therefore it is necessary to build a building that can capture fine sediments. Construction is planned as a system of sediment trap in irrigation channels. The purpose of this study is to analyze the possibility of applying the sediment trap in the river to deposit sediments that escape the check dam. The analysis begins with the selection of the location of the sediment trap, then calculate the dimensions of the sediment trap and the amount of sediment that has settled. Based on the analysis of the selected dimensions with several combinations of gradation of sediment grains, sediment deposition that occurs ranges from 42 - 68%. So it can be concluded making the sediment trap in the river can be done. However, for the application of these sediment traps further research is needed regarding the dimensions of sediment traps that are most optimal for sediment deposition.

scholarly journals Comparative study on dam site selection in the pre-feasibility stage of Shitouzhai Hydropower Station

2021 ◽  
Vol 233 ◽  
pp. 03044
Author(s):  
Pan Shaohong ◽  
Zhang Hongpin
Keyword(s):  
Site Selection ◽  
Early Stage ◽  
Metal Structure ◽  
Hydropower Station ◽  
Geological Conditions ◽  
Depth Analysis ◽  
Dam Site ◽  
Economic Indexes ◽  
Reservoir Project ◽  
Selection Of

The selection of dam site is the key content in the early stage of hydropower station project. Based on the hydrology, topographic and geological conditions, kinetic energy economic indexes, flood loss of reservoir, project layout, electromechanical and metal structure, construction conditions and project investment of the proposed dam site, this paper makes an in-depth analysis of the dam site selection in the pre-feasibility stage of Shitouzhai Hydropower Station, in order to provide beneficial inspiration for the design of similar projects.

Harvested rainwater quality: the importance of appropriate design

2010 ◽  
Vol 61 (7) ◽  
pp. 1707-1714 ◽  
Author(s):  
S. Ward ◽  
F. A. Memon ◽  
D. Butler
Keyword(s):  
Rainwater Harvesting ◽  
Material Selection ◽  
Microbiological Quality ◽  
Quality Of Water ◽  
Copper Zinc ◽  
High Concentrations ◽  
System Designs ◽  
Rainwater Quality ◽  
Selection Of

This paper summarises the physicochemical and microbiological quality of water from a rainwater harvesting (RWH) system in a UK-based office building. 7 microbiological and 34 physicochemical parameters were analysed during an 8 month period. Physicochemically, harvested rainwater quality posed little health risk; most parameters showed concentrations below widely used guideline levels for drinking water. However, RWH system components (e.g. fittings and down pipes) appear to be affected soft water corrosion, resulting in high concentrations of some metals (copper, zinc and aluminium). This suggests the material selection of such fittings should be considered keeping in view the hardness of rainwater of an area. Microbiologically, Cryptosporidium, Salmonella and Legionella were not present in the samples analysed. However, faecal coliform counts were high at the beginning of the study, but did decrease over time in weak correlation with increasing pH. Enterococcus faecalis displayed counts consistently above UK rainwater harvesting standards. Inappropriate roof and rainwater good design, as well as material selection appear to be responsible for the reduced microbial quality, as they promoted contributions from avian sources and inhibited cleaning activities. Building and RWH system designs require greater consideration of local factors, which are critical for optimising harvested rainwater quality, to prevent both the development of contaminated sediments and health impacts.

scholarly journals Engineering Geological Investigation of dam site of proposed Sunkoshi-2 Hydropower Project, Khurkot area, eastern Nepal

2019 ◽  
Vol 58 ◽  
pp. 181-188
Author(s):  
Bipin Adhikari ◽  
Ujjwal Acharya ◽  
Kamala Kant Acharya ◽  
Subesh Ghimire
Keyword(s):  
Rock Mass ◽  
Geological Mapping ◽  
Hydropower Project ◽  
Rock Masses ◽  
Geological Investigation ◽  
Dam Foundation ◽  
Rock Types ◽  
Stability Against Sliding ◽  
Dam Site ◽  
Selection Of

The dam site of proposed Sunkoshi-2 Hydropower Project and its surrounding mainly comprise the Tawa Khola Formation, which is the basal formation of the Bhimphedi Group. Although garnet schist and micaceous quartzite bands are the main rock types; three rock units namely- Schist Unit, Quartzite Unit, and Gneiss Unit were identified. Engineering geological mapping followed by discontinuity survey were carried out. The result exhibited differences in fracture intensity and discontinuity characteristics of rock masses according to rock type. Since joint orientations were found to be consistent over fairly large areas, surface studies of joints were used in predicting subsurface orientations. Rock mass classification was made in line with the Rock Mass Rating System (RMR) and the Dam Mass Rating (DMR) classification for the dam foundation. The rock masses were classified onto fair to good rock classes according to RMR value. Dam foundation analysis regarding stability against sliding using DMR classification helped in selection of suitable dam-axis among two alternatives. Water Quality Standards (2005).

Sign in / Sign up

Export Citation Format

Share Document