Yashwant Katpatal | VNIT, Nagpur (original) (raw)

Papers by Yashwant Katpatal

Social Science Research Network, 2019

Arabian Journal of Geosciences, 2016

Groundwater management requires complete visualization of aquifer characteristics to understand s... more Groundwater management requires complete visualization of aquifer characteristics to understand scientific aspects and hence remains a challenge, especially in hard rock terrains. In the present research paper, a comprehensive approach using 3D stratigraphic model, fence diagrams and numerical modeling has been proposed to understand the groundwater status for effective recharge. The stratigraphy, groundwater flow, and groundwater fluctuations for the period 1999–2010 were analyzed. The total volume of formations, volume of voids, storage capacity, and quantities of recharge of unconfined aquifer system in the Nagpur urban area were estimated. The steady state groundwater flow model of Basalt formation was calibrated to evaluate the subsurface system using Processing Modflow (PMWIN 5.3.2). The calibrated hydraulic head is compared with field observed head. The comparative spatial analysis presents a simple integrated approach in identifying zones with falling groundwater trends suitable for groundwater recharge in hard rock terrain in Nagpur urban area.

Environmental Earth Sciences, 2014

ABSTRACT Recent changes in land use practices, such as increase in orange orchards in central Ind... more ABSTRACT Recent changes in land use practices, such as increase in orange orchards in central India, has put undue pressure on the groundwater resources. Excess withdrawal from the aquifers has resulted in groundwater table decline. The stage of groundwater development in some watersheds has reached 155.85 %, converting these into overexploited watersheds. In the present research paper, a groundwater flow model has been developed to evaluate the ground-water system in a basaltic terrain with Bazada formation. A conceptual model has been developed and calibrated for steady and transient states and the sensitivity analysis was carried out. Future predictions, for current scenario where present practices are continued and for scenario with 20 % reduction in groundwater draft have been made, to select the best strategy for mitigating the problem. The modeling results show that the decline in groundwater level in basaltic and Bazada unconfined aquifers will result into drying up (water level more than 15 m bgl) of 243 km 2 area by 2020. To restore the groundwater level, it is sim-ulated that the groundwater draft rate must be reduced by 20 % for next 10 years. It may be achieved by adopting groundwater management strategies, particularly for irri-gation sector. Keywords Overexploitation Á Unconfined basaltic and Bazada aquifer Á MODFLOW Á Groundwater flow model Á India Introduction

Water resources management in the urban watersheds has become crucial in the present due to rapid... more Water resources management in the urban watersheds has become crucial in the present due to rapid growth. Nagpur, the second capital of Maharashtra state has secured water availability from Totladoh dam but still the surface and subsurface hydrology is under stress. Recently MIHAN (Multi Model International Hub Airport Nagpur), Power plants and other infrastructure projects are upcoming fast but in turn it has started impacting the water resource regime negatively. The precise and scientific method to record this change is through using the geoinformatics approach. In the present study, the geoinformatics approach has been used to quantify the temporal changes occurred in the land use/land cover and drainage pattern due fast changing urban scenario. The impact of urban change may be recorded on the ground water quality. The spatial impact on the groundwater quality has been analyzed in the present study using high resolution satellite data for the years between 2000 to 2010 in the Nagpur urban area. Change detection shows the transformation of crop land and fallow land into developed area (i.e. High dense, medium dense, low dense area). Simultaneously changes in the ground water quality for the same years (i.e. 2000 to 2010) has been detected and risk prone areas are identified. In this paper weights are assigned for different parameters like land use land cover, type of soil, drainage networks, slope of the area, fluctuation of water levels in the wells, infiltration rate, chemical properties of ground water etc. based on their importance to surface and subsurface hydrological regime in an urban watershed overlay method has been used for analyses. Finally remedial measures are suggested to restore the current scenario for better development of ground water in future.

Journal of Earth System Science, 2014

Journal of Environmental Science & Engineering, 2020

Journal of Agrometeorology

Evapotranspiration (ET) estimation is important for hydrological modelling and water management f... more Evapotranspiration (ET) estimation is important for hydrological modelling and water management for irrigation. The present study estimates the reference evapotranspiration using FAO Penman-Monteith (FAO P-M) method and SWAT hydrological model, and its spatial variation during ENSO events during 1996 to 2013. The spatial variation of crop coefficient and actual evapotranspiration (ETa) is also analyzed. The results from these methods are compared for various El Niño-Southern Oscillation (ENSO) events and normal years. MODIS NDVI data was used to generate crop coefficients which were further used for generation of ETa.The results show that the ET0 estimated using FAO P-M is less during the pre-monsoon period than ET0 estimated using SWAT model. ET0values from FAO P-M show decreasing trends while those by SWAT show increasing trends. Also, ET0 shows higher values during post monsoon period of El Niño years as compared to La Niña and normal years.

Arabian Journal of Geosciences, 2021

The organizations in different countries involved in seismic zoning modify the maps in response t... more The organizations in different countries involved in seismic zoning modify the maps in response to various seismic events. The predictive ground motion is used in the analyses which may not be estimated using a single attenuation relation, because it is established on theoretical basis not with the actual ones and hence always errors are included in the analysis. However, the impact of faults is not considered in many of such seismic zoning efforts in several countries. An earthquake is generally triggered along the fault line; magnitude of generated earthquake depends on many factors, mainly the fault characteristics. Hence, the fault is the basic source of seismic activity and its presence and importance directly influences the seismic status of a region. In the present study a new term “fault importance index (FII)” is proposed which is a numeric value estimated from fault characteristics. The FII value for each of linear feature is calculated and relation is derived between the ...

Clustering based regionalisation and the trends in precipitation in the Pranhita catchment, India... more Clustering based regionalisation and the trends in precipitation in the Pranhita catchment, India using the annual precipitation data pertaining to 131 rainfall stations during 1970 - 2011 is reported here. The rainfall data was subjected to various quality checks, homogeneity tests and discordancy measures which identify nonclimatic factors responsible for breaks in the data and the outliers in the dataset. The area was subdivided into homogeneous zones using statistical and spatial clustering. The heterogeneity measure based on coefficient of variations showed that the identified clusters are homogeneous in nature. The change in precipitation has been calculated by trend analysis on the Precipitation Index (PI). Though trend line of the entire study area did not show any variation, a positive trend was observed in Region #1.This clearly indicated that within large homogeneous areas, minor variations in climate are possible and mappable. Thus there is a need to divide large catchme...

World applied sciences journal, 2009

Hydrologic Modeling

The industrialisation and urbanisation have significant impacts on hydrological regimes within th... more The industrialisation and urbanisation have significant impacts on hydrological regimes within the watersheds. The spatial analysis in urban watersheds is prerequisite for management of surface and subsurface water regimes. The objective of the study is to analyse the impacts of increase in impervious surface area (ISA) in urban watersheds of the Nagpur city. High-resolution satellite images were used of year 2000 and 2012. Significant increase in ISA was observed in the watersheds between 2000 and 2012 having impacts on vegetation index, runoff, CN and flash floods. Statistical analyses were used to establish the relationship between runoff, impervious surface areas, vegetation index, slope and runoff coefficient.

Water Management and Water Governance

International Journal of Hydrology Science and Technology

The Soil Conservation Service - Curve Number (SCS-CN) method is extensively used to calculate the... more The Soil Conservation Service - Curve Number (SCS-CN) method is extensively used to calculate the runoff from rainfall over a large catchment over the world. Slope is an important criterion for runoff but a very few attempts have been made to evaluate the effect of slope on the CN with runoff potential. The objective of this paper is to summarise the historical review on the effects of slope on CN and runoff potential in various regions by the hydrologists. This paper also depicts that how the various researchers proved the importance of consideration of slope for CN and runoff estimation. In addition, paper highlights the key features of research in future like to classify the watersheds on slope based CN, accurate Antecedent Moisture Condition (AMC) and proper initial abstraction in the various regions etc. Considering these parameters an accurate runoff estimation can be predicted and managed properly in the urban watersheds.

Journal of Engineering Science and Technology Review

A Groundwater Level Monitoring Network (GWLMN) is the most direct and important source of data fo... more A Groundwater Level Monitoring Network (GWLMN) is the most direct and important source of data for monitoring hydrogeological variations in aquifers. Extensive research has been conducted on surface water and groundwater quality monitoring networks, but less consideration has been given to GWLMNs. Due to a lack of funding and negligence, GWLMNs are either limited or not enough for decision-making purposes. This review initially summarizes the historical developments of GWLMNs in different countries and then, the needs, design approaches, recent developments and future challenges are articulated comprehensively. The needs for GWLMNs generally include information on (1) spatiotemporal assessments (2) climate change (3) land subsidence and (4) Groundwater and Surface Water (GW-SW) interactions. This article reviews the evolution of various design approaches utilized in the past, with respect to their strengths and weaknesses such as geostatistical, entropy, Multi-Criteria Analysis (MCA), and others. The present and shifting trends in research on the design of groundwater monitoring networks are discussed. In addition, developments, challenges and opportunities in utilizing recent remote sensing products are briefly outlined. Future research scopes include the need to develop systematic and continuous GWLMNs in many developing countries, the conjunctive use of field and remotely sensed data, such as NASA's Gravity Recovery and Climate Change Experiment (GRACE) data to design GWLMNs, and the design of an integrated monitoring network to study the link between climate and groundwater level changes to better and more efficiently design GWLMNs.

Journal of Hydrologic Engineering

AbstractEl Nino Southern Oscillation (ENSO) is an irregular periodic variation of atmospheric pre... more AbstractEl Nino Southern Oscillation (ENSO) is an irregular periodic variation of atmospheric pressure and sea surface temperatures over the tropical eastern Pacific Ocean, affecting climate in mos...

Groundwater

Gravity Recovery and Climate Experiment (GRACE) satellite mission is ground-breaking information ... more Gravity Recovery and Climate Experiment (GRACE) satellite mission is ground-breaking information hotspot for the evaluation of groundwater storage. The present study aims at validating the sensitivity of GRACE data to groundwater storage variation within a basaltic aquifer system after its statistical downscaling on a regional scale. The basaltic aquifer system which covers 82.06% area of Maharashtra state in India, is selected as the study area. Five types of basaltic aquifer systems with varying ground water storage capacities, based on hydrologic characteristics, have been identified within the study area. The spatial and seasonal trend analysis of observed in-situ groundwater storage anomalies (ΔGWSano) computed from groundwater level data of 983 wells from the year 2002-2016, has been performed to analyze the variation in groundwater storages in the different basaltic aquifer system. The groundwater storage anomalies (ΔGWSDano) have been derived from GRACE Release 05 (RL05) after removing the soil moisture anomaly (ΔSMano) and canopy water storage anomaly (ΔCNOano) obtained from Global Land Data Assimilation System (GLDAS) land surface models (NOAH, MOSAIC, CLM and VIC). The Artificial Neural Network technique has been used to downscale the GRACE and GLDAS data at a finer spatial resolution of 0.1250 . The study shows that downscaled GRACE and GLDAS data at a finer spatial resolution is sensitive to seasonal groundwater storage variability in different basaltic aquifer systems and the regression coefficient R has been found satisfactory in the range of 0.696-0.818. This article is protected by copyright. All rights reserved.