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1969 Dec

Issue (Volume No. 33, Number 2)

HYDROLOGICAL MODELLING OF XEBANGFAI RIVER BASIN IN LAO PDR: A CASE STUDY USING SWAT MODEL

In this study, a GIS based hydrological model, SWAT (Soil and Water Assessment Tool) was applied for modeling the Xebangfai watershed in center part of LAO PDR. The water balance modeling was performed on annual, monthly and daily basis using spatial and temporal data of surface runoff. The climatic data required by the SWAT i.e., daily precipitation, maximum/minimum air temperature, solar radiation, wind speed and relative humidity was used as input for the model to simulate runoff. Besides these data, meteorological data, topographical map, DEM map, soil map, and land use map of the watershed were used as input to the model. Soil and Water Assessment Tool (SWAT) model was successfully calibrated and validated for the years 1997-2002 and 2003-2008 respectively. Coefficient of determination (R2 ), Nash and Sutcliffe efficiency (NSE), Index of agreement (d) and relative error (RE) were adopted to evaluate model performance during calibration and validation period. Study indicated that due to high magnitude of precipitation and good water retention capacity, the study area has high potential for agricultural activities.

by Somzay Champathangkham and Ashish Pandey
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  • Apr, 2013
    Volume - 33, No. - 2
    LONG TERM OCEAN WAVE FORECASTING ALONG INDIAN COAST
    R.P. Dubey and Bitanjaya Das

    The knowledge of long term wave climate is of utmost importance for the planning, designing, construction and maintenance of marine structures. Especially for design of coastal structures wave heights with a return period of 50 or 100 years or more i...

1969 Dec

Issue (Volume No. 33, Number 2)

LONG TERM OCEAN WAVE FORECASTING ALONG INDIAN COAST

The knowledge of long term wave climate is of utmost importance for the planning, designing, construction and maintenance of marine structures. Especially for design of coastal structures wave heights with a return period of 50 or 100 years or more is required. Ideally, the determination of extreme waves should be based on the statistical analysis of long term measurements. Since the long term measurements of waves, which occur during the storm, are seldom available, the extreme value analysis for the waves is carried out using extrapolation methods. India Meteorological Department (IMD) provides the record of storms in the form of synoptic charts (pressure distribution) and storm tracks for the moving storm. Storm hind casting analysis were carried out for a site near Mumbai on the West coast and near Puducherry on the East coast of India. A comparative study has been done for the prediction of significant wave heights for these storms using parametric and empirical approaches for both the sites. Extreme wave analysis was done using Gumbel, Weibull and log-normal distribution methods. The source of data, methodology adopted for analysis and the prediction of extreme waves along with analysis are described in this paper.

by R.P. Dubey and Bitanjaya Das
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  • Apr, 2013
    Volume - 33, No. - 2
    EFFECT OF COST ELEMENTS ON OPTIMAL CANAL DESIGN
    Syed Zafar Syed Muzaffar , S.L. Atmapoojya and D.K. Agarwal

    This paper deals with the study of effect of cost elements on optimal canal design i.e. the effect of cost of lining of curve, sides and base of canal section on the cost of optimal canal design. The dimensions of an optimal canal section are determi...

1969 Dec

Issue (Volume No. 33, Number 2)

EFFECT OF COST ELEMENTS ON OPTIMAL CANAL DESIGN

This paper deals with the study of effect of cost elements on optimal canal design i.e. the effect of cost of lining of curve, sides and base of canal section on the cost of optimal canal design. The dimensions of an optimal canal section are determined by microeconomic theory the value of b/y ratio is determined by trial and error method. Influence of various parameters on the design of the lining has been studied, which is achieved by using computer ?C? programming. The graph is plotted total cost of canal section of different values against b/y ratio of the section. The effect of cost of lining of curve, cost of lining of sides, cost of lining of base for different values has been seen from the graph when r = f (y) the b/y ratio increases & total cost increases after the optimal value of cost and similarly b/y ratio decreases the total cost of section increases after the optimal value and when r = constant after optimal value of the section b/y ratio increases, total cost of section increases and b/y ratio decreases the total cost of section increases

by Syed Zafar Syed Muzaffar , S.L. Atmapoojya and D.K. Agarwal
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  • Apr, 2013
    Volume - 33, No. - 2
    CURVE NUMBER AFFECTED BY SLOPE OF EXPERIMENTAL PLOT HAVING MAIZE CROP
    Raj Kaji Shrestha , S.K. Mishra and Ashish Pandey

    Employing the observed natural rainfall-runoff data, this study investigates the effect of slope of experimental plots having maize crop on the resulting runoff curve number, the only parameter of the Soil Conservation Service Curve Number (SCS-CN) m...

1969 Dec

Issue (Volume No. 33, Number 2)

CURVE NUMBER AFFECTED BY SLOPE OF EXPERIMENTAL PLOT HAVING MAIZE CROP

Employing the observed natural rainfall-runoff data, this study investigates the effect of slope of experimental plots having maize crop on the resulting runoff curve number, the only parameter of the Soil Conservation Service Curve Number (SCS-CN) methodology. The soil of field plots of all 1%, 3%, and 5% slopes when tested for infiltration using double ring infiltrometer was found to fall in Hydrologic Soil Group 'C'. For the same soil, land use, and rainfall, CN-values were found to increase with slope, and vice versa.

by Raj Kaji Shrestha , S.K. Mishra and Ashish Pandey
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1969 Dec

Issue (Volume No. 33, Number 2)

STATUS PAPER ON WATER SHORTAGE AND REQUIREMENT OF UPPER CHAMBAL SUB-BASIN OF MALWA REGION IN MADHYA PRADESH (INDIA)

For effective planning of available water in the Malwa Region of Madhya Pradesh belonging to Upper Chambal Sub-Basin, an attempt is made in the present study through water balance studies using the inflow/ run-off data in the area. The study include estimation of projections of the domestic, live stock, irrigation industrial requirements of the area along with water availability in the Gandhi Sagar Reservoir as well as the ground water resources. The water balance study defines the additional water requirement in the Sub-basin in the year 2050. It has been concluded that the Sub-basin is highly water deficient even on present day. Per capita water availability considering import and export is 212 cum and it will further come down to 121 cum in 2050. The additional requirement of water at 75% dependability in 2011 is 1016 MCM and in 2050 is 2536 MCM.

by Mukesh Chauhan and R.K. Shrivastava
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  • Apr, 2013
    Volume - 33, No. - 3
    COMPARATIVE REVIEW OF RECENTLY DEVELOPED HYDROLOGIC MODELS
    Bir Singh Dhami and Ashish Pandey

    Present study is focused on a comparative evaluation of some recently developed, regularly updated and well documented hydrologic models namely: AnnAGNPS, GSSHA, HYPE, Hec-HMS, MIKE-SHE, PRMS, SWAT, WetSpa, and WinSRM. All these models are public dom...

1969 Dec

Issue (Volume No. 33, Number 3)

COMPARATIVE REVIEW OF RECENTLY DEVELOPED HYDROLOGIC MODELS

Present study is focused on a comparative evaluation of some recently developed, regularly updated and well documented hydrologic models namely: AnnAGNPS, GSSHA, HYPE, Hec-HMS, MIKE-SHE, PRMS, SWAT, WetSpa, and WinSRM. All these models are public domain (freely available) except MIKE-SHE. AnnAGNPS, HYPE, SWAT and WinSRM are continuous simulation models while GSSHA, Hec-HMS, MIKE-SHE, PRMS and WetSpa have both long-term and single event simulation capabilities. In this study, models are evaluated based on: (I) Hydrological processes that the model can simulate, (II) Governing equations used to simulate the hydrologic processes, (III) Minimum data required to run the model and (IV) spatial and temporal scale of the model. This study can be helpful in the selection of suitable model as per the problem at hand and save lots of time required just to know whether the model is suitable or not.

by Bir Singh Dhami and Ashish Pandey
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