O&M Manual for Karanja Dam January 2020 GOVERNMENT OF KARNATAKA Karanja Project Operation and Maintenance Manual for Karanja Dam State of Karnataka Doc. No. CDSO_O&M_KA06MH0181_karanja_DAM KAWRD_01_v2.0 January 2020 Central Water Commission Ministry of Water Resources, River Development & Ganga Rejuvenation Government of India 1 O&M Manual for Karanja Dam January 2020 Front Cover Photograph: Downstream view of Karanja Dam during rehabilitation works carried out under the Dam Rehabilitation & Improvement Project (DRIP). The Scope of Work entailed Reaming of porous holes of drainage gallery, Re- construction of dry sone rock toe and improvement to v notch, fixing rain water drain and scour filling on downstream right and left side, security aspects/ lighting/ barbed fencing, strengthening and arresting of leakage of right bank and left bank sluice gate, improvement to existing road adjacent to bund left and right of downstream and strengthening and improvements of gates and other electromechanical components of Karanja Dam. 2 O&M Manual for Karanja Dam January 2020 Operation and Maintenance Manual for Karanja Dam Prepared by the Dam Safety Rehabilitation Directorate with Assistance from KARNATKA NEERAVRI NIGAM LIMITED (A Government of Karnataka undertaking) State of Karnataka 3 O&M Manual for Karanja Dam January 2020 KARANATAKA NEERAVARI NIGAMA LIMITED (A Government of Karnataka Enterprises) This operation and maintenance Manual for Karanja Dam in no way restricts the dam owner in digressing from her/ this responsibilities. This state Dam safety Organization or the central water commission cannot be held responsible for the efficacy of this manual developed based on documents provided by the dam owner. The Dam owner and her /his operators must exercise appropriate discretion when implementing and use of the operation and maintenance manual for managing the working of the dam and appurtenant structures. The manual was developed for the purpose of organizing and managing the operation, inspection and maintenance of the dam for reducing risk and optimizing performance of the dam Chief Engineer KNNL IP Zone Kalburgi (Karnataka) Ph-08472-256561 Email: [email protected] Copy right @2018 Department of Water Resources. All rights reserved. This publication is copy right and may not be resold or reproduced in any manner without the prior consent of DoWR. 6 O&M Manual for Karanja Dam January 2020 KARANATAKA NEERAVARI NIGAMA LIMITED (A Government of Karnataka Enterprises) State Dam Safety Organization PREFACE This Operation and Maintenance (O&M) Manual for Karanja Project is a detailed set of written descriptions of step-by-step procedures for ensuring that the dam is safely operated and properly maintained. Timely inspection and maintenance are necessary for the safe functioning of the dam and continued productive use of the dam and reservoir. The term “O&M” as employed in this manual includes operation, inspection, maintenance and repair of dam components, replacement of equipment and appurtenant structures, as required. This manual is provided to assist the dam owner in management of their project in a safe and efficient manner. The Dam Safety Bill, 2010, introduced in the Lok Sabha on August 30, 2010, and subsequently referred to the Parliamentary Standing Committee on Water Resources for examination, prompted the need for updated procedures for dam owners to follow during day-to-day, 24/7 operation of their respective dams. The draft Dam Safety Bill requires State Dam Safety Organizations (SDSO) to keep perpetual vigilance, carry out inspections regularly, and monitor the operation and maintenance of all dams in order to ensure their safe functioning. Where a SDSO does not exist, the National Committee on Dam Safety acting through the Central Dam Safety Organisation is required to carry out these activities. This manual was prepared following the Guidelines for preparing O&M Manuals for dams (Doc. No. CDSO_GUD_DS_O3_v1.0) published by CWC in the year 2018 under DRIP. Director, State Project Management Unit, DRIP, Bengaluru. 7 O&M Manual for Karanja Dam January 2020 Team Members Involved in Preparing this O&M Manual. Sri. Jagannath Halinge Chief Engineer, Reviewer KNNL, IP Zone Kalaburgi Karnataka. Sri. Jagannath Halinge Superintending Engineer, KNNL, I.P Reviewer Circle Kalaburgi. Phabba Ravikiran Executive Engineer, KNNL Prepared original Draft KPC Division No 1, Bidar. Sri Shivakumar Swamy Assistant Executive Engineer, KNNL KP Dam Sub Division No-3 halhalli Assisted in availing all Sri Anandkumar Assistant Engineer, KNNL, necessary information. K.P.Dam, Sub-Division, No-3 Halhalli. 8 O&M Manual for Karanja Dam January 2020 TABLE OF CONTENTS MESSAGE ............................................................................................................................4 FORWARD ............................................................................................................................5 LIST OF APPENDICES ...........................................................................................................12 LIST OF TABLES ..................................................................................................................12 LIST OF FIGURES .................................................................................................................13 CHAPTER-1: GENERAL INFORMATION ...................................................................................15 1.1 Introduction ......................................................................................................15 1.2 Purpose, Location & Description of Karanja Dam ..........................................15 1.3 Background Details of the Project ...................................................................16 1.3.1 Dam Site Location ...........................................................................................16 1.3.2 Karanja Reservoir Planning .............................................................................18 1.3.3 Main Design Features & Components of Karanja Dam ..................................22 1.4 Salient Features of Karanja Dam .....................................................................23 1.5 Assignment of Responsibility ..........................................................................28 1.5.1 Roles & Responsibilities of the AEE & AE during Monsoon .........................29 1.5.2 Roles & Responsibilities of the SE & EE during Monsoon ............................30 1.5.3 Roles & Responsibilities of the Chief Engineer during Monsoon ...................31 1.6 Collection & Reporting of Dam & Reservoir Data .........................................31 1.7 Public & Project Staff – Health & Safety ........................................................32 1.7.1 Restricted Area.................................................................................................32 1.7.2 Details of the Security Arrangements at Karanja Dam Site ............................32 1.8 Staff Position, Communication & Warning System ........................................34 1.8.1 Schedule of General Duties for Project Engineers ..........................................35 1.8.2 Electro-Mechanical Inspections/ Checks .........................................................37 1.9 Distribution of Operation & Maintenance Manual ..........................................40 1.10 Supporting Documents & Reference Material .................................................41 CHAPTER-2: PROJECT OPERATION ........................................................................................42 2.1 Basic Data ........................................................................................................42 2.1.1 Area Capacity Curve ........................................................................................42 2.1.2 Design Flood & Features Related to Safety .....................................................56 2.2 Flood Management at Karanja Reservoir ........................................................58 2.2.1 Gate Operation .................................................................................................58 2.2.2 Rule Curve .......................................................................................................64 9 O&M Manual for Karanja Dam January 2020 2.2.3 Flood Peaks of Different Return Periods .........................................................66 2.2.4 Gate operation Procedures for Normal flow conditions ..................................66 2.2.5 Inflow Forecasting ...........................................................................................66 2.2.6 Methodology of flood Regulation at Karanja Dam .........................................68 2.2.6.1 Inflow Computation .........................................................................................68 2.2.6.2 Examples of Inflow Computation ....................................................................68 2.2.7 Computation procedure for Required Radial Crest Gate Opening ..................69 2.2.8 Summary of Flood Regulation Procedure........................................................98 2.3 Operation of Radial Crest Gates of Karanja Dam ...........................................98 2.3.1 Brief Description ..............................................................................................98 2.3.2 Radial Crest Gates – Technical Data ...............................................................99 2.3.3 Salient Features ................................................................................................99