Geeta S. Joshi - Academia.edu (original) (raw)

Papers by Geeta S. Joshi

Civil Engineering Journal, Feb 28, 2017

The use of an Artificial Neural Network (ANN) is becoming common due to its ability to analyse co... more The use of an Artificial Neural Network (ANN) is becoming common due to its ability to analyse complex nonlinear events. An ANN has a flexible, convenient and easy mathematical structure to identify the nonlinear relationships between input and output data sets. This capability could efficiently be employed for the different hydrological models such as rainfall-runoff models, which are inherently nonlinear in nature. Artificial Neural Networks (ANN) can be used in cases where the available data is limited. The present work involves the development of an ANN model using Feed-Forward Back Propagation algorithm for establishing monthly and annual rainfall runoff correlations. The hydrologic variables used were monthly and annual rainfall and runoff for monthly and annual time period of monsoon season. The ANN model developed in this study is applied to Dharoi reservoir watersheds of Sabarmati river basin of India. The hydrologic data were available for twenty-nine years at Dharoi station at Dharoi dam project. The model results yielding into the least error is recommended for simulating the rainfall-runoff characteristics of the watersheds. The obtained results can help the water resource managers to operate the reservoir properly in the case of extreme events such as flooding and drought.

International journal of innovative technology and exploring engineering, Sep 30, 2019

Climate change is one of the most discussed issues affecting the environment nowadays. Many resea... more Climate change is one of the most discussed issues affecting the environment nowadays. Many researchers have been agreed that the increase in temperature in comparison to the previous century is due to anthropologically related activities, though there are enough historical evidence to support the theory that climate change is a natural phenomenon. This paper reviews the impact of climate change by assessing the trend of annual and monthly rainfall and representing spatial variability over the Orsang river basin in Narmada lower river basin in the state of Gujarat, India. This will be helpful to study the impacts of climate change on hydrology and water resources, and planning & management of water resources, environmental protection, and ecological balance over the orsang river basin, India.

International journal of engineering and advanced technology, Oct 30, 2019

The study presents the hydraulic design and analysis of Rural Water Distribution System (WDS) for... more The study presents the hydraulic design and analysis of Rural Water Distribution System (WDS) for Nava shihora region of zone 1 of the state of Gujarat, India. Water supply distribution system is designed for this study for population estimated for future 30 years. LOOP 4.0 and Water Gems v8i software have been used and the results are compared to determine the economical size of pipes for water distribution system. The economical size of pipes of water supply distribution system is designed by considering the constraints; residual pressure at each node, velocity of flow in pipe, head loos in pipes, material of pipes, elevated service reservoir level, peak factor and available commercial pipe diameters. Further water distribution system has been analyzed for extended period simulation (EPS) for the present population scenario for intermittent water supply using Water Gems v8i. Further water supply system is analyzed the residual chlorine concentration at nodes and in the pipe links and also the total cost of water supply system of rural region is estimated.

International journal of recent technology and engineering, Jul 30, 2019

Due to climate change, there is an increased/decreased frequency of peak flood discharge in river... more Due to climate change, there is an increased/decreased frequency of peak flood discharge in river and streams. The most important concern of planning is to safe passing of the extreme flood discharge influenced by extreme climatic changes. It is a concern for planning for the storage capacity to safely store extreme discharge/inflow of the river. In this paper, probability theories and statistics for flood frequency factor (K) are applied and based on the results; it is found that the Extreme value model results in to a best model for frequency factor K, as it is yielding the minimum relative error. Using the frequency factor, the flood frequency analysis for peak flood is carried out for climate change scenario/Advance scenario. The peak discharge in advance scenario is more as compare to the base line scenario at most of the stations except three stations located on the southeast of the Sabarmati river basin.

Physics And Chemistry Of The Earth, Parts A/b/c, Jun 1, 2022

Leadership and Management in Engineering, Apr 1, 2010

India's Eleventh Plan includes strategies and plans for infrastructure development and inclusive ... more India's Eleventh Plan includes strategies and plans for infrastructure development and inclusive growth during 2007 to 2012. The Eleventh Plan's strategy involves an increase in investment in infrastructure through both the public and private sectors. In the private sector, the strategy is to promote investment directly where feasible or through some form of public-private partnership ͑PPP͒. Public investment has been given priority in areas where private participation is unlikely to be forthcoming. Where there is scope for private investment, the aim will be to attract such investment in a transparent manner with clearly defined responsibilities and an open, competitive bidding process. Infrastructure priorities include all-weather roads; round-the-clock availability of power at a stable voltage and frequency; water for irrigation; railways that are not overcrowded, run on time, and do not overcharge for freight; ports with low turnaround time to reduce costs of imports and exports; airports to handle growing air traffic; air services to connect all parts of the country; and telecommunications and broadband connectivity to provide the benefits of the Internet to people all over the country.

Water Resources Management, Jan 28, 2010

This paper describes the development of a performance evaluation based model for the operation of... more This paper describes the development of a performance evaluation based model for the operation of multipurpose multireservoir in a river basin system. The methodology developed in the present study has been evolved for (1) allocation of releases for multipurpose from each reservoir, (2) fair allocation of mandatory flow releases in the river, and (3) the assessment of the system capability for multipurpose operation. The System Performance Index (SYSPI) has been introduced as a measure of the overall performance of the system. SYSPI is defined as a function of the performance indicator indices which are developed to measure each of the objectives of the multireservoir system, namely, reliability of water supply, hydropower production, revenue income, and spill prevention. The SYSPI is maximized using a search algorithm which is linked to the simulation module. The application of the developed methodology is demonstrated for the reservoirs on the Narmada River System, India. The application of the methodology should enable increasing the hydropower generation within the existing framework.

H2Open Journal

In this study, the coupling of the analytical hierarchy process (AHP) and geographical informatio... more In this study, the coupling of the analytical hierarchy process (AHP) and geographical information system (GIS) was used to assess flood hazards. Spatial analysis in the GIS environment has been applied for the estimation of flood hazard zones in which five relevant physical factors have been selected, namely rainfall amount, slope, elevation, drainage density, and land use. The factors of rainfall amount and land use are subjected to changes over a time horizon. An attempt is made in this study to delineate the flood hazard zones under changing climate, i.e., delineating flood hazard zones in base and climate change scenarios. The proposed method is applied to the Mazam-Watrak River basin in the state of Gujarat, India for the data span 1961–2016. It is concluded that flood hazard zones proliferate in the downstream and eastern middle reaches of the basin and in a very high to high category in climate change scenarios. The results obtained from the AHP have been validated through t...

Physics and Chemistry of the Earth, Parts A/B/C

Journal of emerging technologies and innovative research, May 1, 2019

Though there are enough historical evidences to support the theory that climate change is a natur... more Though there are enough historical evidences to support the theory that climate change is a natural phenomenon, many scientists are widely in agreement that the increase in temperature in the 20th century is anthropologically related. Changes in atmospheric circulation are caused by the differential seasonal adiabatic heating of Ocean, but it is so far unknown how global warming influences the monsoon rainfalls regionally. This paper reviews the relationship between climate change and water resources, variability and change in the trend (monthly and annual) of the rainfall over a small scale region which includes two upper watersheds in Narmada lower sub-basin and will be helpful to study the climate change's impacts on hydrology and water resources, so as to understand and planning and management of water resources, environmental protection, ecological balance etc. IndexTerms-Climate change, Annual and monthly Rainfall, Trend Analysis, Minimum and maximum temperature, Mann-Kendall test and Sen's slope estimator test.

World Environmental and Water Resources Congress 2017, 2017

The International Journal of Climate Change: Impacts and Responses, 2021

Journal of Climate Change, 2021

The present research aims to assess the historical change in rainfall patterns with the changing ... more The present research aims to assess the historical change in rainfall patterns with the changing climate in the Ahmedabad-Gandhinagar district in the state of Gujarat in India. The Mann-Kendall (MK) test along with Sen’s slope estimator have been used for detecting the trend of rainfall data series. The trend of annual rainfall is carried out for – (1) six rain gauge stations established by the State Water Data Center (SWDC) and (2) 11 grid data available from the National Center for Environmental Prediction-Climate Forecast System Reanalysis (NCEP-CFSR) for 35 years starting from 1979 to 2013. Results obtained from these two data sets for the trend detection were found consistent. Furthermore, the analyses of annual and monthly rainfall using MK test and Sen’s slope estimator at six rain gauge stations are carried out in three time periods i.e. 1974-1987, 1988-2001 and 2002-2016. The inverse distance weighted (IDW) method of interpolation is used for the results obtained from the s...

Applied Water Science, 2015

An attempt has been made to develop water quality index (WQI), using six water quality parameters... more An attempt has been made to develop water quality index (WQI), using six water quality parameters pH, dissolved oxygen, biochemical oxygen demand, electrical conductivity, nitrate nitrogen and total coliform measured at three different stations along the Sabarmati river basin from the year 2005 to 2008. Rating scale is developed based on the tolerance limits of inland waters and health point of view. Weighted arithmetic water quality index method was used to find WQI along the stretch of the river basin. It was observed from this study that the impact of human activity and sewage disposal in the river was severe on most of the parameters. The station located in highly urban area showed the worst water quality followed by the station located in moderately urban area and lastly station located in a moderately rural area. It was observed that the main cause of deterioration in water quality was due to the high anthropogenic activities, illegal discharge of sewage and industrial effluent, lack of proper sanitation, unprotected river sites and urban runoff.

Water Resources Management, 2010

Journal of Hydro-environment Research, 2009

This paper presents a simulation model for the operation of multipurpose multireservoir systems. ... more This paper presents a simulation model for the operation of multipurpose multireservoir systems. The simulation model developed in this study has been applied to the Narmada River Reservoir System in India. The model has been formulated for the monthly operation of reservoirs to meet industrial, domestic, irrigation, and hydropower generation water requirements. The simulation model consists of four modules: inflow generation, minimum flow releases, simulation, and performance evaluation. The single-site ThomaseFiering and multisite Lane's Applied Stochastic Techniques (LAST) inflow generation models have been used for the generation of a monthly inflow series. Five performance indicator indices have been formulated for evaluating the performance of the multipurpose multireservoir system: Volume Reliability Index (VRI), Time Reliability Index (TRI), Hydropower Production Index (HPI), Economic Benefits Index (ECBI), and Spill Prevention Index (SPPI). The trade-offs between the performance indicator indices have been obtained using the simulation model. The results from these tradeoffs will assist decision makers in the operation of reservoirs, as well as with planning and comparing operation strategies.

Acta Geophysica, 2021

Global warming is a biggest issue around the world. In this research paper, the temporal and spat... more Global warming is a biggest issue around the world. In this research paper, the temporal and spatial trend analysis of seasonal and annual rainfall on Bhogavo River watersheds in Sabarmati lower basin of Gujarat state of India has been analysed using the data of 11 rain gauge stations installed in Bhogavo watershed. Linear regression, Mann-Kendall Test, Sen's slope test and innovative trend analysis methods are used to carry out monthly and annual rainfall trend analysis. In addition to the rainfall analysis, a number of rainy days change in magnitude as a percentage of mean rainfall have also been analysed using linear regression and Sen's slope method, respectively. The IDW method is used to develop a spatial distribution of annual and seasonal rainfall trend over the study area. From the results, it is concluded that annual rainfall shown increasing (positive) trend at nine stations out of 11 stations. The highest value of change in magnitude of trend as a percentage of mean monthly rainfall has been obtained in the month of July, attributing increasing trend at Sayla station and lowest value magnitude of trend as a percentage of mean rainfall in the monthly rainfall has been obtained in the month of August, attributing decreasing trend at Bavla station. Keywords Bhogavo River watersheds • Climate change • Innovative trend analysis • Mann-kendall test • Rainfall trend • Temporal and spatial trend Electronic supplementary material The online version of this article (

International Journal of Recent Technology and Engineering (IJRTE), 2019

Changing climate has significant impact on the river hydrology and water resources. An assessment... more Changing climate has significant impact on the river hydrology and water resources. An assessment of the availability of water resources in the context of future requirement and expected impact of climate change and its variability is critical for relevant national and regional long-term development strategies and sustainable development. Changes in the climate have been assessed through assessing the Metrologic parameters such as daily maximum and minimum temperature of the month, daily average temperature, annual rainfall, monthly rainfall of the monsoon season, and maximum daily rainfall of the year, number of rainy days in the year and number of rainy days in each month of monsoon season. It is observed that the 1) Maximum daily temperature shows increasing trend in summer season (March to June) and shows reducing trend in winter season (October to February) in the study area. This is indicative of extreme weather in climate change/advance scenario. 2) The monthly rainfall trend shows increasing trend for the magnitude of annual rainfall shows increasing trend in the study area. 3) The number of rainy days in the monsoon season (June to October) shows reducing trend. Rainfall-Runoff regression analysis has been carried out for base line and advance/climate change scenario to investigate the impact of climate change on Water Resources. This study will be helpful to water resources planners and decision makers regarding the strategies to be followed in view of changing climate.