Baaz Puvaa-Naumaana Eop`A[-Jala Irpaot- Vaya- 2014 Maahi,Saabarmait Evam Banaasa Baoisana
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kovala kayaa-laya p`yaaoga hotu For official use only Baart sarkar kond`Iya jala Aayaaoga maahI maMDla,gaaMQaInagar GOVERNMENT OF INDIA CENTRAL WATER COMMISSION MAHI DIVISION , GANDHI NAGAR baaZ pUvaa-naumaana eop`a[-jala irpaoT- vaYa- 2014 maahI,saabarmait evaM banaasa baoisana FLOOD FORECASTING APPRISAL REPORT 2014 MAHI,SABARMATI AND BANAS BASIN nama-da evaM tapI baoisana saMgazna,gaaMQaInagar jala vaO&anaIya p`oxaNa pirmaMDla,gaaMQaInagar maahI maMNDla ,gaaMQaInagar NARMADA & TAPI BASIN ORGANISATION, GANDHINAGAR HYDROLOGICAL OBSERVATION CIRCLE , GANDHINAGAR MAHI DIVISION, GANDHINAGAR frvarI, 2015 February 2015 INDEX Page 1/2 CHAPTER NO. TITLE/ CONTENTS PAGES /TOPICS 1 FLOOD FORECASTING SETUP 1-13 1.1 Introduction 1 1.2 Flood Forecasting Setup 1,2 1.3 Field Setup 2,3 1.4 Flood Forecasting Station under Mahi division 3 a Kadana Dam 4 b Dharoi Dam 5 c Dantiwada Dam 6 d Wanakbori Weir 7 1.5 User Agencies 8-12 1.6 Dissemination of Forecast 12-13 2 BASIN PHYSIOGRAPHY, RIVER SYSTEM 14-18 AND BASIN RAINFALL 2.1 Mahi Basin 14,15 2.1.1 Basin physiography and River system 14,15 2.1.2 Rainfall 15 2.2 Sabarmati Basin 16,17 2.2.1 Basin physiography and River system 16 2.2.2 Rainfall 17 2.3 Banas Basin 17,18 2.3.1 Basin physiography and River system 17,18 2.3.2 Rainfall 18 3 METEOROLOGICAL DATA 19-23 3.1 Arrangements for Receiving Weather Forecast 19, 20 3.2 Raingauge network in Mahi, Sabarmati and Banas Basin 20, 21 3.3 SW Monsoon 2012 - An overview 21-23 3.5 Rainfall obtained over different basin 23 3.5.1 Mahi Basin 23 3.5.2 Sabarmati Basin 23 3.5.3 Banas Basin 23 4 TECHNIQUE FOR FLOOD FORECASTING IN 24-40 MAHI, SABARMATI AND BANAS BASINS 4.1 Mahi Basin 25-33 4.1.1 Kadana Dam 26-30 4.1.1.1 Criteria for issuing forecast 26 4.1.1.2 Data used and its communication 26, 27 4.1.1.3 Methodology 27-30 4.1.2 Wanakbori Weir 30 4.1.2.1 Criteria for issuing forecast 31 4.1.2.2 Data used and its communication 31 4.1.2.3 Methodology 31-33 4.2 Sabarmati Basin 33-37 4.2.1 Dharoi Dam 33-35 4.2.1.1 Criteria for issuing forecast 33 4.2.1.2 Data used and its communication 33,34 4.2.1.3 Methodology 34,35 4.2.2 Subhash Bridge 35-37 4.2.2.1 Criteria for issuing forecast 35 4.2.2.2 Data used and its communication 36 INDEX Page 2/2 CHAPTER NO. TITLE/ CONTENTS PAGES /TOPICS 4.2.2.3 Methodology 36,37 4.3 Banas Basin 37-40 4.3.1 Dantiwada Dam 38 4.3.1.1 Criteria for issuing forecast 38 4.3.1.2 Data used and its communication 38 4.3.1.3 Methodology 38-40 5 HYDROLOGICAL SITUATION IN DIFFERENT BASINS 41-45 DURING SW MONSOON 2010 5.1 Mahi Basin 41,42 5.2 Sabarmati Basin 42-44 5.3 Banas Basin 44,45 6 MODERNISATION OF FLOOD FORECASTING TECHNIQUES 46-49 6.1 Introduction 46 6.2 About the Flood Forecasting (FF) Package 47 6.2.1 Principle used 47 6.2.3 FF Package implementation 47,48 6.2.4 Summary of Model Validation 48 6.2.5 Conclusion 48,49 7 TELEMETRY SYSTEM - MAHI DIVISION 51-52 7.1 Current status 51,52 8 FLOOD DAMAGE 53 9 FORECAST PERFORMANCE 54 10 PROBLEMS FACED AND DEFICIENCIES NOTICED 55,56 10.1 Technical 55 10.2 Administrative 56 11 CONCLUSION 57,58 List of Tables Chap. Table Title Page No. No. 1 1.1 Total No.of existing H.O and Flood forecasting stations of all types and 2 categories under Mahi Division 1.2 The relevant details/criteria for the flood forecasting of forecasting stations 3 1.3 Number of villages likely to be affected Tahasil wise in Mahi basin for 8 which flood level forecast of Wanakbori Weir is used for taking precautionary measures 1.4 Statement showing villages affected by floods of Mahi river on the basis 9,10 of discharge released from Kadana dam 1.5 Number of villages likely to be affected by floods in rivers Sabarmati, 10 Watrak and Shedhi. 1.6 Statement showing villages affected by floods of Sabarmati river on the 11 basis of discharge/Gauge at Subhash bridge 1.7 Number of villages likely to be affected by floods in d/s of 12 Dantiwada dam over Banas river 1.8 Criteria for flood warning signals for forecasting stations 13 2 2.1 State - wise distribution of Mahi basin 14 2.2 Brief outline of main tributaries of the river Mahi 15 2.3 List of existing projects in Mahi basin 15 2.4 State - wise distribution of Sabarmati basin 16 2.5 Brief out line of main tributaries of the river Sabarmati 16 2.6 List of existing projects in Sabarmati basin 17 2.7 State - wise distribution of Banas basin 18 2.8 Brief outline of main tributaries of the river Banas 18 3 3.1 Sub-Division number wise areas for which H.R.W and QPF are supplied 19,20 during monsoon season from FMO, Ahmedabad 3.2 Rainfall Data of CWC stations available through its wireless network & 20,21 Rainfall Data of IMD stations through FMO Ahmedabad 3.3 Month wise distributions of rainfall over different river basins for the 23 current year and previous year 4 4.1 The details of Type of forecast issued, Base stations, Travel time, 25 Warning Level, Danger Level & H.F.L w.r.to Mahi Basin 4.2 The details of Type of forecast issued, Base stations, Travel time, 33 Warning Level, Danger Level & H.F.L w.r.to Sabarmati Basin 4.3 The details of base stations, average travel time, Warning Level, 38 Danger Level & H.F.L w.r.to Banas Basin 9 9.1 Forecast Performance 54 List of statements Page 1/1 Stat. Title Page No. No. 1 Location of Division, Sub Divisions, Gauging Stations in Mahi, Sabarmati and 59,60 Banas river basins 2a Details of the River Gauging Net Work of Mahi Division of all the basins 61,62 2b Salient Features of Flood Forecasting stations maintained by Central Water 63 Commission 3 The particulars of user agencies of flood forecasts of all the 5 flood 64,65 forecasting stations located in Mahi, Sabarmati and Banas basin 4 Details of communication net work showing type of wireless, date of 66 functioning etc. 5 Synoptic situation, HRW provided by FMO, Ahmedabad during 67-71 SW Monsoon 2013 6 Details of QPF provided (in mm) by FMO Ahmedabad for north Gujarat 72-74 region during heavy rainfalls events. 7 The rainfall data during intense rainfall events in Mahi Basin 75 8 The rainfall data during intense rainfall events in Sabarmati basin 76 9 The rainfall data during intense rainfall events in Banas basin 77 10 Methodology, Technique & Type of data used for formulation of forecast for 78 various River Basins 11a Maximum Water Level/Inflow attained at all Sites in Mahi, Sabarmati and 79 Banas Basins during Monsoon 2013 11b Unprecedented Flood Events in North Gujarat under CWC FF & W Network 80 - 2013 Flood Season 11c High Flood Events during Flood Season - 2013 81 11d Low and Moderate Flood Events on Various River Systems - 2013 Flood 82 season 12 Details of Forecast issued for Kadana Dam in Mahi Basin 83 13 Details of Forecast issued for Dharoi Dam in Sabarmati Basin 84 14 The list of Telemetry stations under the jurisdiction of Mahi Division 85 15 Statistical study conducted on Telemetered data 86-91 16a Basin wise- River wise-Flood Forecasting Information during Flood Season 92 20142013 16b Statewise Floof Forecasting Information during Flood Season 2014 93 16c Performance of Flood Forecasting stations (Divisionwise) during Flood 94 Season 2014 16d Flood Forecasting performance from 2000 to 2014 95 List of Plates Page 1/2 Plate Title Page No. 1 Jurisdiction map of Mahi Division 96 2 The Flood Forecasting Network/Basin map of Mahi river basin 97 3 Line diagram of Mahi river basin 98,99 4 Schematic diagram showing forecast activities in Mahi 100 basin 5a Rating/S-D curve of Mahi river at Paderdibadi on Main Mahi 101 river 5b Rating/S-D curve of Anas river at Anas PH-II 102 6a Travel Time curve from Paderdibadi to Kadana dam 103 6b Travel Time curve from Anas PH-II to Kadana dam 104 7 Rainfall - Runoff correlation with API as parameter 105 8 Forecast Dissemination format used for Kadana Dam inflow 106 forecast 9 A worked out example Kadana Dam inflow forecast 107 10 Stage Discharge Curve of Wanakbori Weir after washout of 108 fuse gates in 2006 11 Combined TT of Kadana and Panam Dam reeeleases to 109 Wanakbori weir 12 Forecast Dissemination format used for Wanakbori Weir 110 Flood Level Forecast in case of Moderte Flood 13 A worked out example Wanakbori Weir Flood Level Forecast 111 14 The Basin Map/Flood Forecasting Network of Sabarmati 112 River Basin 15 Line diagram of Sabarmati river basin 113,114 16 Schematic diagram showing forecast activities in 115 Sabarmati Basin 17a Rating/S-D curve of Sabarmati river at Kheroj 116 17b S-D curve of Harnav weir 117 18a Travel Time Curve from Kheroj to Dharoi Dam 118 18b Travel Time Curve from Harnav Weir to Dharoi Dam 119 19 Forecast Dissemniation format used for Dharoi Dam inflow 120 forecast 20 Rating Curve of Sabarmati at Derol Bridge 121 21 S-D curve of Hathmati weir 122 22 Rating/S-D curve of Sabarmati river at Subhash bridge 123 23 Travel Time Curve of Combined Discharge from Derol Bridge 124 Hathmati weir 24 Forecast Dissemniation format used for Subhash Bridge 125 in case of Moderate flood List of Plates contd/.