Emergency Action Plan Malankara Dam KL07MH0049
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Emergency Action Plan Malankara Dam KL07MH0049 Prepared for: Prepared by: Irrigation Department State Project Management Unit, Kerala IDRB, Kerala July 2019 Emergency Action Plan for Malankara Dam July 2019 FOREWORD The basic purpose of this plan is to provide a guide for emergency operations. The plan is intended to assist key officials and emergency organisations to carry out their responsibility for the protection of life and property under a wide range of emergency conditions. When disasters threaten or strike a jurisdiction, people expect elected leaders to take immediate action to deal with the problem. Local government is expected to marshal its resources, channel the efforts of voluntary agencies and private enterprise in the community, and solicit assistance from outside the jurisdiction, if necessary. This is the Emergency Action Plan for Malankara Dam. It assigns responsibility to organizations and individuals for carrying out specific actions in emergencies exceeding to the capacity or routine responsibility of any agency. The plan sets forth lines of authority and organizational relationships and shows how coordination should be achieved. The Plan describes how people and property will be protected and identifies personnel and resources available within the districts involved, or by agreement with others, for use during response and recovery operations. Although an organization may have the foresight to plan for anticipated situations, such planning is of little worth if the planning is not reduced to written form. Personnel familiar with unwritten plans may be unavailable at the time it becomes necessary to implement them. A written plan will furnish a documentary record, which can be referred to as needed. This documentary record will serve to refresh the knowledge of key individuals and can be used to inform persons who become replacements. Primary goals of Emergency Action Plan are: • Protect life and property and alleviate human distress. • Ensure that the public safety and welfare is maintained by coordinating aid. • Improve emergency response through planning and education. • Define roles of Departments and agencies for large and small emergencies. • Develop effective response and coordination among district agencies. • Promote mobilization with less duplication of effort or gaps. • Outline access to resources within corresponding districts. • Encourage partnerships between government, private and volunteer sectors. • Outline the recovery and restoration process (resilience). We wish to place on record our heartful thanks to Dr.Vishwas Mehta IAS, Additional Chief Secretary, Home & Water Resources for his support and encouragement throughout. We also 2 Emergency Action Plan for Malankara Dam July 2019 wish to place our sincere gratitude to Dr. B. Ashok IAS, Secretary, Water Resources for his constant advice and inspiration. We personally thank all field Engineers including Superintending Engineer, Project Circle, Muvattupuzha, Executive Engineer, MVIP Division No.III, Muvattupuzha, Assistant Executive Engineer, MVIP Sub Division No.I, Muttom and Assistant Engineers , Section 1/1 and Section 2/1, Muttom for their efforts in drafting this document with all the inputs. We personally thank all the members of SPMU for their efforts in addressing the issues that was raised time to time and which required intellectual input and strategic thinking. Finally, we personally thank Sri. Rajesh S, Assistant Director, Dam Safety for his painstaking efforts to finalise the document on a time bound manner and without whose contribution this proposal would not have materialized. Chief Engineer (I&D) Chief Engineer IDRB, Vikas Bhavan Projects-II Thiruvananthapuram Thiruvananthapuram 3 Emergency Action Plan for Malankara Dam July 2019 PREFACE Malankara Dam and Reservoir are owned and operated by Irrigation Department, Kerala. The Malankara dam is an earth cum masonry dam across Thodupuzha river, a tributary of Muvattupuzha river. It is located at Muttom in Idukki district near Thodupuzha- Moolamattom road and was constructed for the Muvattupuzha Valley Irrigation Project (MVIP). The dam site is about 27 Km from Muvattupuzha town and 8 Km from Thodupuzha town. There is a network of canal system consisting of two main canals on either banks, its branches and distributaries. It utilizes the tailrace discharge of Idukki Hydroelectric project by inter basin transfer and the runoff from the catchment area of Thodupuzha river up to Malankara. The Project was started in 1974 and completed in 1994 and the project envisages an ayacut of 18173 Ha of land in Kottayam, Ernakulam & Idukki Districts. The project also caters to the water needs of the Hindustan News Print factory at Velloor, near Piravom and providing drinking water facility to KWA Schemes and production of 10.5 MW of electricity at mini Hydro Electric station at Malankara. Malankara Dam acts as a diversion structure and fully opened in rainy season and inflow into dam is not predictable as it mainly depends on KSEB power generation at Moolamattom. The out flowing water from KSEB Power house at Moolamattom after power generation is stored in this dam for irrigation and small scale power generation purposes at Malankara. However in rainy seasons 2 rivers namely Nachar and Vadakkanar in the catchment area also contributes to the inflowing water to this dam. Since the storage capacity of dam is low, dam shutters are opened in a controlled manner in order to control the inflowing huge amount of water from above mentioned 3 areas. Also if the power generation at KSEB Moolamattom is at its maximum its tail discharge is enough to take the dam to its full storage level. The EAP is prepared using the Inundation map developed by Central Project Management Unit (CPMU) for the following three causes of flooding : (1) A dam failure caused by overtopping from the inflow design flood leading to breaching and uncontrolled release of impounded water, (2) A non-flood dam failure caused by internal erosion (piping) with the reservoir at full supply level leading to breaching and uncontrolled releases of impounded waste and (3) A large controlled release flood without dam failure. 4 Emergency Action Plan for Malankara Dam July 2019 Malankara Dam KL07MH0049 Thodupuzha Emergency Action Plan for Malankara Dam was published in July 2019. This is the……. Revision in ………… as updated in ……… Disclaimer Every effort has been taken to estimate the severity of flooding and inundation areas likely to be affected by Malankara Dam in an emergency condition. These estimates are based on available primary and secondary data. Every effort has been made to foresee varied emergency possibilities and develop appropriate notification procedures for timely rescue and relief operations. However, implementation of the Emergency Action Plan (EAP) involves many agencies, who are required to work in a coordinated manner to reduce the consequences of the emergency triggered by the dam site condition. Effectiveness of the rescue and relief operations depend on many factors including the adequacy and accuracy of the estimation of the severity of flooding, coordinated efforts of all the agencies involved in rescue and relief efforts and availability of facilities like power telephones, road communications, etc. EAP Developer may therefore, not be held responsible for the efficiency of the EAP. Chief Engineer Projects-II Thiruvananthapuram Mobile No: 9447246387 Office No: 0471-2324394 5 Emergency Action Plan for Malankara Dam July 2019 Contents Approval and Implementation………………………………………………....05 EAP Distribution List………………………………………………………….06 Log Sheet of Changes………………………………………………………….10 1. Purpose…………………………………………………………………….11 2. Dam Description…………………………………………………………...11 2.1 General……………………………………………………………..11 2.2 Reservoir Operations……………………………………………....11 3. Responsibilities…………………………………………………….............12 3.1 Dam Owner’s Responsibilities………………………………….…12 3.2 Dam Safety Organisation’s Responsibilities………………………17 3.3 Responsibilities for Notification…………………………………...18 3.4 Responsibilities for Evacuation…………………………….……...21 3.5 Responsibilities for Termination and Follow up……………..……23 4. Communications Networks …………………………………………….…24 5. Emergency Detection, Evaluation and Classification……………….….…25 5.1 Emergency Detection……………………………………………...25 5.1.1 Situations…………………………………………………………..25 5.1.2 Signs of Failure……………………………………………..……..25 5.2 Emergency Evaluation and Classification………………………...26 5.3 Previously Known Problems………………………………………28 6. Preparedness……………………………………………………….……....28 6.1 Surveillance…………………………………………………….….29 6.2 Response on forecast of excessive inflow………………….…...…29 6.3 Response during weekends and holidays…………………….……29 6.4 Response during periods of darkness and adverse weather………..29 6.5 Access to the site……………………………………………….….30 6.6 Remedial Actions……………………………………………….…30 7. Supplies and Resources……………………………………………….…...31 7.1 Contracts………………………………………………………..…31 7.2 Equipment and Supplies…………………………………………..32 7.3 Reports…………………………………………………………….32 8. Emergency Operations Centre…………………………………………….32 8.1 Activity log………………………………………………………..32 8.2 Cost of the Emergency Operations Centre………………………...33 9. Inundation Area……………………………………………………….…...33 6 Emergency Action Plan for Malankara Dam July 2019 9.1 Local Evacuation Plan………………………………………….….35 10. Implementation……………………………………………………………36 10.1 Development………………………………………………………36 10.2 Updating………………………………………………..………….36 10.3 Testing……………………………………………………………..36 10.4 Training………………………………………………..…………..38