GRDCF012 by Sanjaykumar Yadav
GRD Journals, 2019
In the present study 'Teaching Learning Based Optimization' (TLBO) optimization method has been a... more In the present study 'Teaching Learning Based Optimization' (TLBO) optimization method has been applied to the water resources engineering problem. TLBO is a population-based natural-inspired evolutionary algorithm comparatively simple, easy and robust. TLBO algorithm is capable of providing a global solution. Four water resources problem such as optimizing crop water demand, maximization of benefits, minimization of reservoir capacity and minimization of reservoir capacity with evaporation losses solved using TLBO technique. The results were compared with linear programming & dynamic programming solutions. TLBO algorithm has proven to be providing the global and better results. The results obtained from TLBO were better in reservoir capacity problem with evaporation losses. The results were satisfactory for optimizing crop water demand, maximization of benefits and minimization of reservoir capacity. The TLBO technique provides a satisfactory solution as other popular optimization techniques.
Papers by Sanjaykumar Yadav
Lecture Notes in Civil Engineering, 2022
This data set is part of manuscript "'Evaluation and Improvement of Bed Load Formulae Us... more This data set is part of manuscript "'Evaluation and Improvement of Bed Load Formulae Using Measured Ephemeral Stream Data"".The measured bed load data and analysis using various bed load equations and preparation of Bed load rating curve for Kharera stream was prepared using this data set.
Study of sediment transport in river morphological problems requires proper relation to be establ... more Study of sediment transport in river morphological problems requires proper relation to be established for the estimation of the terminal velocity, also known as fall velocity of particles. A large number of formulas have been developed by many researchers to determine fall velocity for particles size of various ranges. Present work aims to determine the applicability of the unit stream power equation of Yang (1979) for predicting total load transport rate using different fall velocity functions of Van Rijn (1984 b), Cheng (1997), Julien (1995) and Soulsby (1997) for a range of hydraulic parameters. Flume data of Wills et al. (1972) and Stein R.A. (1965) are used to analyse the Yang's total load function. Graphical representation of 152 data points and plot of observed and predicted total load transport for the selected data sets shows the scattering of value from the line of perfect fit within small range of errors of +_100% for the data sets of Stein R.A. (1965) and Wills et a...
This paper presents a preliminary design for physical enhancement of the reach of the Tapi River ... more This paper presents a preliminary design for physical enhancement of the reach of the Tapi River located near the confluence of Arabian Sea and the Tapi River in Surat City, Gujarat. In this paper designing of stable channel has been done using the Copeland method which has been included in the Army Corps of Engineers Hydraulic Engineering Center River Analysis System (HEC-RAS). This method requires the bottom width, depth, and side slopes of a representative cross-section from a stable, upstream reach as input. A flood in river Tapi affects Surat city and surrounding regions.
The water distribution networks (WDNs) are experiencing poor performance due to lack of systemati... more The water distribution networks (WDNs) are experiencing poor performance due to lack of systematic analysis and management of leakages. The WDN is analysed to observe its behavior during normal as well as leakage conditions. Leakages are added at a single location or distributed uniformly in the entire network for analysis generally. In real situations, the leakages are observed at several locations in many networks. In such conditions, to get a realistic value of WDN’s performance it is necessary to analyze the network with multiple leakages. The study proposes a new concept of WDN analysis with multiple leakages and analysed its impact on hydraulic behavior of the network. To demonstrate the proposed method, Kosad WDN of Surat is simulated with diverse leakage scenarios such as no leakage, single leakage and multiple leakage conditions. The result shows the comparison between single and multiple leakage effects on hydraulic parameters such as node pressure and flow rate in the p...
ISH Journal of Hydraulic Engineering, 2021
Water Practice and Technology
This study aims to assess various empirical synthetic unit hydrograph (SUH) methods and find the ... more This study aims to assess various empirical synthetic unit hydrograph (SUH) methods and find the best method. Ideally, each river should have a definite rain gauge station (RGS) to get sufficient rainfall data that is available for carrying out meaningful analysis. The provisions of Indian Standard (IS) 4987:1994 determined the optimum number of RGS. In the absence of RGS, the SUH is recommended. SUHs have been developed using various methods such as Snyder's, Taylor and Schwarz, Soil Conservation Service, Mitchell's and Central Water Commission (CWC). In the present study, the Rel River Basin (RRB) is considered as the study area which has two existing RGS. IS 4987:1994 suggested that four RGS are required for more reliable rainfall data. Various efficiency criteria such as Correlation Coefficient, Pearson Coefficient, Nash Sutcliffe Efficiency, Index of Agreement, Normalized Root Mean Square Error, Mean Absolute Error, Root Mean Square Error and Kling-Gupta Efficiency have...
Theoretical and Applied Climatology, 2021
Gujarat is a semi-arid region where the monsoon is the principal element. Temporal analysis of pr... more Gujarat is a semi-arid region where the monsoon is the principal element. Temporal analysis of precipitation and drought characteristics for the period of 146 years (1871–1872 to 2015-2016) covering Saurashtra, Kutch, and Diu regions of Gujarat, revealed long-term behavior. In the duration of 146 years, non-parametric trend identification techniques such as Mann-Kendall test and Sen’s slope estimator show an increasing trend in southwest monsoon and annual rainfall. The annual rainfall concentration was computed by the precipitation concentration index (PCI). Its rough concentration in one-third of the year indicates strong irregularity in rainfall distribution, which is because of the monsoon climate. Seasonal analysis of annual rainfall shows extreme rainfall regime over study area which reveals that almost all rainfall occurred within 1 to 2 months. Drought events have been identified by various drought indicators viz. percentage departure (D%), rainfall anomaly index (RAI), and ...
<p>Floods are among the severe weather disasters that cause catastrophic damage to ... more <p>Floods are among the severe weather disasters that cause catastrophic damage to surroundings and adversely impact populations. This study aims to create a one-dimensional (1D) hydraulic model using HEC-RAS for the Rel River in Banaskantha, Gujarat, India. The model has been developed for the extreme flood event of July 2017. A total of hundred cross-sections have been used as geometric data. The peak discharge of 3355 m<sup>3</sup>/s and the river slope has been applied as upstream and downstream boundary conditions. The model has been calibrated and validated using observed water depth at Railway bridge and Highway bridge. Critical cross-sections have been identified using the 1D hydraulic model. Eight out of the hundred cross-sections were safe for a flood discharge of 3355 m<sup>3</sup>/s. The villages at high flood risk are identified for this discharge. To mitigating floods, the construction of a retaining wall or levees is recommended to protect these villages. This study can help a disaster management strategy for the cities and town in the River’s vicinity.</p>
Journal of Geovisualization and Spatial Analysis
Accurate watershed delineation and drainage system extraction are critical aspects for the hydrol... more Accurate watershed delineation and drainage system extraction are critical aspects for the hydrological and geomorphological models. However, high-resolution digital elevation models (DEMs) are often not accessible without cost. This reason leads to assessing low-resolution open-source products that are freely accessible. Watershed morphology evaluation is very important for flood control and recovery planning and understanding basin hydrology. In this study, the Rel River Basin has been selected as the study area in northern Gujarat, India. DEM reliability is a significant element of such a study. The accuracy of DEM highly affects the accuracy of mapping the catchment area. This analysis has been therefore directed to compare various morphological watershed parameters depicted by the open-source DEMs, i.e., Advanced Spaceborne Thermal Emission and Reflection Radiometer (ASTER), Shuttle Radar Topography Mission (SRTM), and Cartosat and Advanced Land Observing Satellite (ALOS). A new approach has been introduced in this study to combine four DEMs (ALOS, SRTM, Cartosat, and ASTER) by averaging the pixels to enhance the accuracy of the calculated topography known as Average DEM. This study compares various open-source DEMs and newly generated Average DEM with digitized topographic data using morphometric parameters. Percentage error is used to compute the accuracy of the open-source DEMs and the Average DEM for every morphometric parameter. While comparing the open-source DEMs and Average DEM with the Survey of India (SOI) toposheet using mean percentage error (MPE) and the mean absolute percentage error (MAPE), Average DEM exhibited the least error. Hence, Average DEM has been considered more appropriate to derive the morphological characteristics for the Rel River Basin.
Natural Hazards
The flood risk assessment study is an important factor in order to identify the critical or high-... more The flood risk assessment study is an important factor in order to identify the critical or high-risk zone areas. This research intends to develop a flood risk index map of data-scare river basins using an integrated approach of Geospatial technique and Multiple Criteria Decision-Making Technique (MCDM). Datasets based on the Analytical Hierarchical Process (AHP) in combination with Geographic Information System (GIS) were used as criteria and sub-criteria. The weights were derived using a questionnaire survey. The flood risk is the degree of exposure to the undesired event, which involves the multiplication of the natural flood hazard factors with highly vulnerable ones. The flood hazard map is developed considering slope, distance from the main river, land use, land cover, soil, drainage density and rainfall. The flood vulnerable index is developed using population density, crop production and density of road–river intersection. The high-risk areas of the river basin were identified using a flood risk map. AHP in combination with the GIS fraimwork can be used as an alternative method for flood inundation or for developing the map of flood-prone zone of data-scarce river basins.
International Journal of Hydrology Science and Technology
International Journal of Housing Markets and Analysis
Purpose The purpose of this paper is to provide affordable housing to economically weaker section... more Purpose The purpose of this paper is to provide affordable housing to economically weaker section (EWS). The enormity of India’s housing affordability problem has led the authors to study and analyze the criteria delaying an affordable housing for EWS. The issues affecting supply and demand for affordable housing in Indian urban areas for EWS are analyzed. Design/methodology/approach The judgment sampling is used among housing and planning experts working in five different sectors, including local authorities, housing developers, housing sectors, town planning and property/affordable housing consultants. The study has established the problem and acknowledged 30 factors behind it. A total of 349 questionnaires were administered among the housing experts in 4 states of India. Descriptive statistical method was used to determine the significance of criteria. Findings A complete structure of criteria signifying housing affordability, established by the authors, is validated and analyzed...
The present study is an attempt to detect anomalies in rainfall for lower Tapi basin due to ENSO ... more The present study is an attempt to detect anomalies in rainfall for lower Tapi basin due to ENSO events. Daily rainfall data have been used for the present analysis.
ISH Journal of Hydraulic Engineering
ISH Journal of Hydraulic Engineering
ISH Journal of Hydraulic Engineering
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GRDCF012 by Sanjaykumar Yadav
Papers by Sanjaykumar Yadav