कᴂ द्रीय भूमि जल बो셍ड जल संसाधन, नदी विकास और गंगा संरक्षण विभाग, जल शक्ति मंत्रालय भारि सरकार Central Ground Water Board Department of Water Resources, River Development and Ganga Rejuvenation, Ministry of Jal Shakti Government of India AQUIFER MAPPING AND MANAGEMENT OF GROUND WATER RESOURCES DIMAPUR DISTRICT, NAGALAND उत्तर पूिी क्षेत्र, गुिाहाटी North Eastern Region, Guwahati FOR OFFICIAL USE ONLY Technical report: Series D No… ..... /2019-20 REPORT ON AQUIFER MAPPING AND MANAGEMENT IN DIMAPUR DISTRICT, NAGALAND ANNUAL ACTION PLAN, 2017-18 Central Ground Water Board कᴂद्रीय भूजल बो셍ड MINISTRY OF JAL SHAKTI जल शक्ति मंत्रालय Department of Water Resources, River Development and Ganga Rejuvenation जल संसाधन,नदी क्तिकास और गंगा संरक्षण क्तिभाग GOVERNMENT OF INDIA भारत सरकार NORTH EASTERN REGION उत्तर पूिीक्षेत्र GUWAHATI गुिाहाटी March 2019 REPORT ON AQUIFER MAPPING AND MANAGEMENT IN DIMAPUR DISTRICT, NAGALAND ANNUAL ACTION PLAN, 2017-18 By Wonjano Mozhui Scientist-B & Anenuo Pienyu Assistant Hydrogeologist Central Ground Water Board North Eastern Region, Guwahati CONTENT 1.0 INTRODUCTION ....................................................................................................................................... 1 1.1 Objectives .............................................................................................................................................. 1 1.2 Scope of the Study ................................................................................................................................. 1 1.3 Approach and Methodology .................................................................................................................. 1 1.4 Area Details ........................................................................................................................................... 2 1.5. Data availability, data adequacy, data gap analysis & data generation ...................................................... 2 1.6 Rainfall ........................................................................................................................................................ 3 1.7 Physiography ............................................................................................................................................... 3 1.8 Geomorphology ........................................................................................................................................... 4 1.9 Land use....................................................................................................................................................... 4 1.10 Soil ............................................................................................................................................................. 4 1.11 Drainage .................................................................................................................................................... 5 1.12 Geology ..................................................................................................................................................... 5 CHAPTER II ..................................................................................................................................................... 7 2.0 DATA COLLECTION AND GENERATION ............................................................................................ 7 2.1 Data Collection: ........................................................................................................................................... 7 2.1.1 Exploration: .............................................................................................................................................. 7 2.2 Data Generation ........................................................................................................................................... 8 2.2.2 Water level ................................................................................................................................................ 8 2.3 Geophysical Study ....................................................................................................................................... 9 2.4 Ground Water Quality ................................................................................................................................. 9 2.5 Soil Infiltration Studies .............................................................................................................................. 10 CHAPTER III .................................................................................................................................................. 11 3.0 DATA INTERPRETATION, INTEGRATION AND AQUIFER MAPPING ................................... 11 3.1 Ground Water Exploration ........................................................................................................................ 11 3.2 Depth to Water level .................................................................................................................................. 14 3.3 Ground water flow direction ...................................................................................................................... 15 3.4 Ground water quality ................................................................................................................ 15 CHAPTER IV .................................................................................................................................................. 17 4.0 GROUND WATER RESOURCES ..................................................................................................... 17 CHAPTER V ................................................................................................................................................... 19 5.0 GROUND WATER RELATED ISSUES ................................................................................................. 19 5.1 Identification of issues ............................................................................................................................... 19 5.2 Future demand scenario and stress aspects of the aquifer ......................................................................... 19 5.3 Future demand for agriculture ................................................................................................................... 19 5.4 Stress Aspects of aquifer ........................................................................................................................... 19 CHAPTER VI .................................................................................................................................................. 21 6.0 MANAGEMENT STRATEGIES ............................................................................................................ 21 LIST OF TABLES Table: 2.1 Tube Wells constructed in the Dimapur Valley by DGM, Govt of Nagaland ...................................7 Table.2.2 Exploration in Dimapur District, Nagaland. .......................................................................................8 Table.2.3Depth to Water Level (in mbgl) for the NHNS stations in Dimapur valley ........................................8 Table.2.4 Depth to Water Level (in mbgl) of Key wells in Dimapur valley .....................................................9 Table 2.5: Salient features of the soil infiltration test sites .............................................................................. 10 Table 2.6: Summary of Infiltration Tests ........................................................................................................ 10 Table.3.1Distribution of granular zone in various depths ................................................................................ 13 Table.3.2Grain size analysis of the aquifer material........................................................................................ 14 Table.4. Ground water resource as on March 2017 and availability for future use ......................................... 18 Table 5.1: Water requirement for all sectors ................................................................................................... 19 Table 5.2: Supply and demand gap in drinking water sector ........................................................................... 20 Table 5.3: Supply and demand gap in irrigation .............................................................................................. 20 Table 6.1: Cropping pattern of Dimapur district, Nagaland ............................................................................ 21 Table 6.2. Cropping pattern, proposed cropping pattern, intended cropping intensity .................................... 22 Table 6.3. Proposed cropping pattern with water deficit months and IWR, Dimapur district ......................... 22 Table 6.4: Crop-wise and month-wise precipitation deficit (mm) using CROPWAT 8 for Dimapur district. 23 Table 6.5: Irrigation water requirement (ham) of Dimapur district ................................................................. 23 LIST OF FIGURES Fig.1.1: Administrative set ups of Dimapur district ...........................................................................................2 Fig.1.2: Data availability map ............................................................................................................................3 Fig.1.3: Hill shade map of Dimapur district .......................................................................................................4