Research Paper | Civil Engineering | Nepal | Volume 9 Issue 8, August 2020
Overland (Surface) Flow and Time of Concentration for Highly Permeable Sandy Soil Slope: An Experimental Study Using Rainfall Simulator
Mahesh Dhital, Dak Bahadur Khadka
Abstract: Time of concentration is defined in many ways in literature and it is calculated rather subjectively in practice. The situation becomes adverse as the terrain slope reaches to zero; because the slope generally appears in the denominator of any formula for time of concentration, this time goes to infinity as the slope becomes zero. Estimation of it seems very paradox in nature (Grimaldi, 2012). The variables affecting this time parameter on highly permeable slope plot have been studied through plot scale laboratory experiments using rainfall simulator on artificial catchment prepared. It has been found that the initial moisture content and rainfall rate control this parameter. Some of the existing times of concentration methods have been compared, and it is found that the empirical models compared under predict this time parameter. This under prediction can be attributed first to the differing concepts of time of concentration previous researchers have been modeled, secondly to the absence of any accounting for the initial moisture content in the irrespective equations and thirdly to the watersheds where these models have been calibrated. At lower time of concentrations, Izzard-based model predictions show some results close as well as logical to the observed values. Regression equations have been derived based upon the experiments to determine the overland (surface) flow times on a plot of 2.02 meter length, 1 meter wide and 0.15 m depth soil plots of highly permeable natural sand (at the slope of 5 to 150 to the horizontal plane) with uniform rainfall intensity. The application of these equations on other lengths cannot be ascertained. Equations for the hydrograph have been determined for highly permeable sand plot. From the matrix solver for multiple regression analysis, regression model assumed and the exponents of the parameters are obtained as: 0.5 for length, -0.14 of rainfall intensity, -0.11 of surface slope, and -0.05 for initial moisture content for highly
Keywords: overland flow, Time of concerntration, regression corellation equation, highly pearmeable sandy soil slope
Edition: Volume 9 Issue 8, August 2020,
Pages: 104 - 116
How to Cite this Article?
Mahesh Dhital, Dak Bahadur Khadka, "Overland (Surface) Flow and Time of Concentration for Highly Permeable Sandy Soil Slope: An Experimental Study Using Rainfall Simulator", International Journal of Science and Research (IJSR), https://www.ijsr.net/get_abstract.php?paper_id=SR20728223130, Volume 9 Issue 8, August 2020, 104 - 116
How to Share this Article?
Similar Articles with Keyword 'flow'
To Minimize Construction Cost and Time of Panvel-Karjat Suburban Corridor (Under MUTP-3A) by Implementation of Value Engineering Aspect
Rushabh. N. Jain
Deterrent to Pedestrian Used More Extensively as Travel Mode in Misurata
Abdallah. N. Kamba
Similar Articles with Keyword 'Time'
Wave Transit Time in Polymer-Mortar Composites
Msc. Eng. Yasir Mohammed Abdulateef Al Bayati, Asst. Prof. Dr. Besma Mohammed Fahad
Case Study Papers on Practical Guidelines for the Inspection and Repair of Hot Dip Galvanized Coatings
Harshal S Khode
Similar Articles with Keyword 'regression'
The Foreman Motivation Role for the High - Rise Building Projects Implementation Meets Quality Standards (Q - Pass)
Parluhutan Bobby, Dwi Dinariana, Arman Jayadi
Development of a Mathematical Model to Estimate Soaked California Bearing Ratio of a Lateritic Soil in Ekiti Northern Senatorial District, Nigeria
Oluwayinka Glory Akinwamide, Joseph Adebayo Ige, Joshua Tunbosun Akinwamide
Similar Articles with Keyword 'equation'
Investigation of the Effects of Urban Iron Ore Tailing in Bituminous Mix
Thanusha V, Vinay
Perturbation Analysis of Unsaturated Flow in Dry Clay
Similar Articles with Keyword 'highly'
Assessment of Water Consumption in Construction
Pawar Yogesh R, Shrikant R. Kate
Geo-Spatial Ground Water Quality Mapping and Assessment of Mining Region ? A Case Study
Singha Soumya, Verma. M. K, Singha Sudhakar
Similar Articles with Keyword 'sandy'
Numerical Simulation of a Building Collapse on Sandy Clay of Douala City in Cameroon
A. Abanda; Dr. D. Fokwa; P. Eba'a
Using Space-borne Hyperspectral Imagery on Mapping Nitrogen Fertilizer Excess to the Environment
Yehia H. Miky, Ahmed F. El Shouny
Similar Articles with Keyword 'soil'
Predicting the Strength Properties of Swelling Clay
Omer S. M. Hamza, Magdi M. E. Zumrawi, Awad E. M. Mohamed
Removal of Chromium & Lead Using Water Hyacinth and Bio-Sorbents
Aashish Sanjeev Medhe, Adesh Bamb, Priyobarta Singh, Prof. Swati Shegane
Similar Articles with Keyword 'slope'
Dynamic Analysis of Sloped Building: Experimental & Numerical Studies
Akshay Patil, Manas Rathore
Multi Storied Garment Showroom Building Manual Calculation Design - Slabs
Sandeep Kumar Sharma