INTEGRATION OF THEMATIC MAPS FOR IDENTIFICATION OF GROUND WATER EXPLORATION ZONES IN THE PARTS OF BHIND, MADHYA PRADESH (INDIA)
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1 Journal of Environmental Research And Development Vol. 2 No. 4, April-June, 2008 INTEGRATION OF THEMATIC MAPS FOR IDENTIFICATION OF GROUND WATER EXPLORATION ZONES IN THE PARTS OF BHIND, MADHYA PRADESH (INDIA) Vineesha Singh* 1 and M.C. Khare 1. School of Studies in Earth Science,Jiwaji University, Gwalior (INDIA) 2. Institute of Information Technology and Management(IITM),Gwalior (INDIA) Received October 15, 2007 Accepted April 12, 2008 ABSTRACT The present study is mainly covered with alluvium, dolerite, shale and sandstone of kaimur formation. Groundwater occurs at shallow depth under water table conditions within the alluvium, weathered and fractured sandstone. The depth to water table below ground level in the district during pre- monsoon ranges from m. but the same shows a range of m during the post monsoon. High fluctuation of water table is observed in mostly sanstone and alluvium lithology. The various thematic maps integrated and overlapping technique were proved to be very efficient in assessing the groundwater potential for exploration and development purposes of any area. Key Words : Groundwater movement, Water table, Well inventory, Static water level (SWL), Pre and Post monsoon data. INTRODUCTION Hydrogeology is the study of inter relationship of geologic materials and process with water, especially groundwater 3.The environment of groundwater is primarily controlled by precipitation, infiltration and hydro geological properties of the aquifers. The hydrogeological regime of a particular region involves the mode of occurrence and movement of groundwater, and its relation with the lateral and vertical variation of lithology,position and potential of aquifer and the chemical nature of groundwater in the region.the groundwater resources are highly influenced by the geomorphic and geological set-up of the region. In nature two types of water bearing formations(aquifer) are present i.e., weathered rock aquifer and fractured rock aquifer 1.Weathered rock aquifer is also called the water table aquifer formed by the weathered mantle.it shows considerable variation in water yielding properties depending on the nature of weathered material and depth of weathering. In hard rock area, thickness of weathered zone may range up to 100m. 4,5.Fractured rock aquifer i.e., mean the fractures and joints are present in the hard rock hold a substantial quantity of groundwater. The confined saturated zone might be extended up to depth of 50-60m. 9 In the present paper, Survey of India toposheet no. 54J/7,well inventory data were used to preparation of water table maps, demarcation of groundwater *Author for correspondence 580
2 Journal of Environmental Research And Development movement, depth to water level maps for identification of groundwater potential zones for exploration purposes.10 THE STUDY AREA The study area lies at a distance of 20km. from Gwalior.It is bounded by longitudes and latitudes covered in the Survey of India toposheet no. 54J/7 (Fig. 1).The total area is about 150sq km.the morar river forms the eastern part of the study area.national highway no.3 passes through the area. The average annual rainfall is about mm. Geologically,the eastern part of the area Vol. 2 No. 4, April-June 2008 covered by the alluvium and western part of the area comprises of lower vindhyan formation consisting of sandstone,dolerite and shale (Fig. 2). Groundwater occurs in confined to unconfined at depth. Based on the water bearing properties of rock, they are classified in to major classes i.e.,aquifer and aquiclude.the main hydrolithounit exposed in the investigated area of wells are alluvium,lateritic-shale and sandstone act as a good aquifer (photo plate 1, photo plate 2 and photo plate 3).6-8 Data used Fig. 1 : Location map of study Area 581
3 Journal of Environmental Research And Development Vol. 2 No. 4, April-June, 2008 Fig. 2 : Geological Map Photo plate 1 : Lateritic with shale horizon seen at Girgawan dugwell 582
4 Journal of Environmental Research And Development Vol. 2 No. 4, April-June 2008 Photo plate 2 : Weathered sandstone horizon seen at Tilori dugwell Photo plate 3 : A small diameter Dug-cum bored well with seen at Baretha village Survey of India toposheet no. 54J/7 on 1:50000 scale were used for the prepration of base map,well inventory data and collateral data of the study area. METHODOLOGY The methodology used is consist of the following steps : Inventory of wells Measurement of static water level in the field Collection of pre monsoon period and post 583
5 Journal of Environmental Research And Development Vol. 2 No. 4, April-June, 2008 monsoon well data Prepration of water table maps during pre and post monsoon periods Prepration of depth to water level during pre and post monsoon periods Measurement of well level Fluctuation Prepration of Fluctuation maps Interpretation of water table,depth to water level, Fluctuation maps Integration,correlation of various thematic maps with lithology and Field verification Finalization of groundwater potential zoning map Similar work has been attempt to various authors. 9,10 The concept of integration of thematic maps through remote sensing and GIS has proved to be an efficient tool in groundwater studies. 6-8 Keeping this in view, an attempt is made to identify groundwater potential zone for groundwater exploration sites using integrated approach in the study area. RESULTS AND DISCUSSION Groundwater Intensive and extensive inventory of investigation in 61 dugwells reveals that ground water in the district occurs mainly in (1) fractured zone of weathered rocks (2) zone of unconsolidated sediments (laterite). Groundwater occurs under watertable condition. The weathered zone is of particular impature as it acts as reservoir of groundwater. The yield of an individual well is dependent largely on the thickness and permeability of the rock in the shallow zone. But the yield of the deeper wells installed in hardrocks is dependent upon areal extent and inter connection of joints and fractures. Fractures in the granitic rocks tend to close at a depth of about 110 meters while in metasediments fractures are limited down to 50 m. below ground level. 4 The unconsolidated sediments occur as discontinuous patches. They comprises sand, silt, Kankar and clay. These alluvial deposits are recent in age are restricted to 2-8 m. depth. Ground water occurs within the primary porosity of the unconsolidated sediments. The fluctuation of water table in these areas is comparatively low in respect to the adjoining areas. 10,11 Inventory of wells In order to understand the behaviours of shallow aquifers, it is necessary to prepare the inventory of open wells tapping the shallow aquifers. Most of the water withdrawals take place through them to be utilized for drinking and irrigation purposes.61 representative dugcum bored wells were selected for the well inventory (Table 1). Statistical data of dug wells were measured on the basis of well inventory (Table 2). Perusing Table 2, it is observed that the wells in alluvium are relatively deeper and more in number as compared with sandstone lithounit.the minimum and maximum range of dug wells were measured in the study area (Table 3). Perusing the above statistical data, it is observed that the depth of dugwells in alluvium and sandstone is almost identical or vary slightly. Similary the3 water levels during pre-monsoon period in dugwells tapping alluvium and sandstone are about identical. This may be due to the fact that the sandstone done well sorted. joined and fractured and show higher permeabilities. Water table maps Water table is the subdued replica of the surface topography. It means the upper surface of the zone of saturation is called the water table of phreatic surface 5 and zone of phreatic water 2. Water table maps representing upper surface of zone of saturation, reflect mutual relationship between groundwater velocity, hydrogeologic properties of water bearing material, topography of the region and water table slopes. The water table maps provide valuable information concerning hydrogeologic set-up of the area in terms of flow pattern and 584
6 Journal of Environmental Research And Development Vol. 2 No. 4, April-June 2008 Table 1 : Well inventory of the study area 585
7 Journal of Environmental Research And Development Vol. 2 No. 4, April-June,
8 Journal of Environmental Research And Development Vol. 2 No. 4, April-June 2008 Table 2 : Total depth and percentage of well ranges in different lithounits 587
9 Journal of Environmental Research And Development Vol. 2 No. 4, April-June, 2008 Table 3 : Ranges of depth to water level during pre and post monsoon periods Lithounit Total no of wells Depth of wells(m) Depth to water level(m) Pre monsoon Depth to water level(m) Post monsoon min Max. mean min Max. mean min Max. mean Alluvium Laterite Sandstone permeabilites.these maps are also useful in establishing the relationship of surface water bodies and groundwater flow,to locate the areas of recharge,discharge and hudraulic gradients.water table maps were prepared by triagulation method using static water level data (SWL) of pre monsoon and post monsoon period (Fig. 3 and Fig. 4). During pre monsoon period the reduce level above mean sea level(msl) is m and m. during post monsoon period. The water level maps were prepared to determine the following : 1. Ground water flow direction and its slope 2. Areas of recharge and discharge 3. Hydraulic gradients properties Pre and Post-monsoon water table maps On the pre-monsoon map (Fig. 3) ground water spacing variation indicates variability of hydraulic gradient. The widely spaced water table contours indicates aquifer of relatively gentle hydraulic gradient with high permeability, while closely spaced contours indicates steeper hydraulic gradient with low permeability near Tilori, Sohli and Ghirongi and near Badwari area. It means the runoff will be more and infiltration will be less. There are less potential areas for ground water development. The widely spaced contours which indicate high infiltration with less amount of runoff near Baretha ka pura, Laxhmangarh, Guthina, Singwari, Malanpur (Fig. 3). Similar attempt have been made on post monsoon water table maps (Fig. 4). Depth to water level maps Groundwater is developed in the study area through dug cum bored well to meet the depth to water level data of pre monsoon and post monsoon periods. The depth to ground water level maps were prepared from well inventory data for pre monsoon and post monsoon season. These maps indicate variation in ground water levels divided into 4 categories i.e., 1. Water level less than 4m below groundwater level (bgl.) 2. Water level below between 5 to 8 m below groundwater level (bgl.) 3. Water level between 9 to 12 m below groundwater level (bgl.) 4. Water level more than 12 m below groundwater level (bgl.) The depth to water table below ground level in the district during pre- monsoon ranges from m. but the same shows a range of m during the post monsoon. The deepest water table in pre monsoon m. were recorded is a dugwell at Guthina village,while the shallowest water table 2.90m. were found at Rithorakalan village of the study area (Table 1).The depth to water level map of pre-monsoon (Fig. 5) reveals that in general 588
10 Fig. 3 : Pre-monsoon water table map of study area. Fig. 4 : Post-monsoon water table map of study area. Journal of Environmental Research And Development 589 Vol. 2 No. 4, April-June 2008
11 Journal of Environmental Research And Development Vol. 2 No. 4, April-June, 2008 Fig. 5 : Pre-monsoon Depth to water level map of the study area. the water table lies at a depth varying between m bgl.thus, it is observed that during pre monsoon period the water table rests at a deeper level in the sandstone terrain, whereas in the alluvium terrain it rests at a relatively shallower level near Hariram ka pura,naugaon,laxhmangarh. The depth to water table map during post monsoon period (Fig. 6) reveals that in general the water level rests at a depth varying between m bgl. The fluctuation were calculated using well inventory data of post and pre-monsoon periods Ground water fluctuation indicates the change in storage. It is direct response of the ground water recharge & discharge used. Fluctuation is varying between into 8.50 m. Malanpur, Dang Guthina, Baretha village. Fluctuation of the water table in general varies between m bgl (Fig.7). In the southern part of the area the water table fluctuates between m near Baretha, Kheriya, Sohli, Bahadurpur. A higher zone of fluctuation ( m) have been observed around Malanpur and Hariramkapura. Higher fluctuation of water table is observed mostly in sandstone terrain while relatively lower fluctuation is recorded in alluvium terrain. On the basis of groundwater flow 590
12 Fig. 6 : Post-monsoon Depth to water level map of the study area. Fig. 7 : Water level fluctuation map of the study area. Journal of Environmental Research And Development 591 Vol. 2 No. 4, April-June 2008
13 Journal of Environmental Research And Development movement recharge zones were observed near shekpura, Girgwan, Guthina, Hariramkapura, while discharge area observed near Bohadapur, Barwani, Mawai village.finally, based on the map integration and correlation with litohology Vol. 2 No. 4, April-June, 2008 the groundwater potential map were prepared which shows favourable zones for ground water exploitation and development purposes (Fig. 8). CONCLUSION Fig. 8 : Map showing favourable zones for groundwater exploitation purposes. In order to delineate the groundwater potential zones for exploration and development purposes. In general different thematic layers viz. Lithology, water table map, depth to water table map have used to be integrated. This provides the broad idea about the ground water potential map of an area which may be used for any groundwater development and management programme. 592 ACKNOWLEDGEMENT
14 Journal of Environmental Research And Development Vol. 2 No. 4, April-June 2008 The authors are extremely thankful to Prof. U.C. Singh for his constant encouragement and valuable discussions during the course of this work. The authors also acknowledge Mr. S.N.Mahore for his help in this work. REFERENCES 1. Ballukraya P.N., Sakthivadirel R. and Baratan R., Hydro geological studies in the granitic gneisses of South India. Proceedings of the seminar on Hydrology, Osmania University, Hyderabad, , (1983). 2. Davis S.N. and Dewiest R.S.M., Hydrogeology, John wiley and Sons., Inc., Newyork, 463, (1966). 3. Fetter C.W., Applied Hydrogeology, Nerrill Pub. Co., A well and Howell information Co., Columbia, 529, (1988). 4. Ghosh A.K. and Talukdar T., Hydrogeology of the hard rock aquifers in Puruliya district, west Bengal scope for sustainable management. Proc. Seminar on Aquifer Characteristic and Groundwater Management in Eastern India, Dept. of Geological Sciences, Jadavpur University, Calcutta, (1996). 5. Kavanth K.R., Ground water Assessment, Development and Management, Tata McGraw Hill publishing Co. Ltd., New Delhi, 720, (1987). 6. Khan M.A. and Moharana P.C., Use of remote sensing and GIS in the delineation and characterization of groundwater prospect zones, J. Indian Soc. Remote Sensing, 30(3), , (2002). 7. Krishnamurthy J., Venkataesa Kumar N., Jayraman V. and Manivel M., An approach to demarcate ground water potential zones through Remote Sensing and GIS. International Journal of Remote Sensing, 17(10), , (1996). 8. Saraf A.K. and Chaudhary P.R., Integrated remote sensing and GIS for groundwater exploration and identification of artificial recharges sites, International Journal of Remote Sensing, 19(10), , (1998). 9. Sharma S.K. and Seetharam A.M., Design of dug wells in hard rock areas case study in Karnataka State, Journal Geological society of India, 22, , (1981) 10. Sikdar P.K., Assessment and Management of groundwater resources in puruliya district, West Bengal, Indian Journal of Geology, 72(4), 31-41, (2000). 11. Singh A.K. and Prakash S.R., Integration of thematic maps through GIS for identification of Groundwater potential zones, Map India proceedings, development.net, 1-10, (2004). SAVE THE ENVIRONMENT Good Environment is good health Air Pollution causes health hazards Recycle every drop of Water 593
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