Preliminary Hydrology Report
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GOVERNMENT OF JAMMU AND KASHMIR, DISASTER MANAGEMENT, RELIEF, REHABILITATION AND RECONSTRUCTION (DMRRR) DEPARTMENT FEASIBILITY AND DETAILED PROJECT REPORT FOR FLOOD MITIGATION AND COMPREHENSIVE RIVER MANAGEMENT MEASURES IN TAWI BASIN PRELIMINARY HYDROLOGY REPORT OCTOBER, 2018 FUNDED BY Consultancy Services for Preparing Feasibility and Detailed Project Report for Flood Mitigation and Comprehensive River Management Measures for Tawi Basin PRELIMINARY HYDROLOGY REPORT Consultancy Services for Preparing Feasibility and Detailed Project Report for Flood Mitigation and Comprehensive River Management Measures for Tawi Basin Preliminary Hydrology Report Rev. 0 – October 2018 PROJECT INFORMATION: Client: Project Management Unit (PMU), Jhelum & Tawi Flood Recovery Project (JTFRP), Disaster Management, Relief, Rehabilitation and Reconstruction Department, Government of Jammu and Kashmir Contract n.º: PMU/JTFRP/CS/IFCJ/2017/2 Designation: Consultancy Services for Preparing Feasibility and Detailed Project Report for Flood Mitigation and Comprehensive River Management Measures for Tawi Basin Authors: Aqualogus, Engenharia e Ambiente, Lda. (AQUALOGUS) Oiltech Engineering Pvt Ltd (OILTECH) Dissemination level: Confidential DELIVERABLE INFORMATION: Deliverable: Preliminary Hydrology Report Prepared by: AQUALOGUS, OILTECH Rev. N.º Ref.: Date Changes Verified Approved: 0 220.01-D1b-0 29-10-2018 (initial version) SC, BN, RS, MS DG I Consultancy Services for Preparing Feasibility and Detailed Project Report for Flood Mitigation and Comprehensive River Management Measures for Tawi Basin Preliminary Hydrology Report Rev. 0 – October 2018 FEASIBILITY AND DETAILED PROJECT REPORT FOR FLOOD MITIGATION AND COMPREHENSIVE RIVER MANAGEMENT MEASURES FOR TAWI BASIN PRELIMINARY HYDROLOGY REPORT INDEX TEXT Page 1 INTRODUCTION ............................................................................................................ 1 2 TAWI RIVER BASIN CHARACTERIZATION ................................................................. 2 3 DATA AVAILABILITY AND QUALITY ANALYSIS......................................................... 6 3.1 AVAILABLE DATA ................................................................................................. 6 3.2 PRELIMINARY QUALITY ANALYSIS .................................................................. 11 3.2.1 Preliminary remarks .................................................................................. 11 3.2.2 Gauging stations rating curves ................................................................. 12 3.2.3 Test for outliers of the maximum flood peaks ............................................ 13 3.3 ADDITIONAL HYDROLOGY DATA REQUIRED FOR A COMPREHENSIVE ANALYSIS ........................................................................................................... 15 4 HISTORIC FLOODS ANALYSIS .................................................................................. 16 4.1 REVIEW AND ANALYSIS OF HISTORIC FLOODS IN JAMMU & KASHMIR ...... 16 4.2 REVIEW AND ANALYSIS OF HISTORIC FLOODS IN TAWI RIVER ................... 17 5 PRELIMINARY CLIMATE CHARACTERIZATION ....................................................... 22 6 PRELIMINARY HYDROLOGY ANALYSIS ................................................................... 24 6.1 TAWI RIVER BASIN HYDROLOGY ..................................................................... 24 6.2 FLOOD FREQUENCY ANALYSIS ....................................................................... 27 7 SUMMARY AND RECOMMENDATIONS ..................................................................... 30 8 REFERENCES ............................................................................................................. 31 TABLES Table 3.1 – Gauging stations and available hydrological data in Tawi River. ......................... 6 Table 3.2 – Different threshold levels for flood warning and highest flood levels at Jammu city gauging station. ................................................................................ 9 II Consultancy Services for Preparing Feasibility and Detailed Project Report for Flood Mitigation and Comprehensive River Management Measures for Tawi Basin Preliminary Hydrology Report Rev. 0 – October 2018 Table 3.3 – Outlier Test results for Jammu and Udhampur Stations .................................... 14 Table 4.1 – List of historical flood events occurred in Jammu& Kashmir region (after Kelman et al., 2018) ........................................................................................... 16 Table 6.1 – Major Nallahs in Tawi River Basin. .................................................................... 25 Table 6.2 – Summary of Results of Flood Frequency Analysis for Udhampur station........... 27 Table 6.3 – Summary of Results of Flood Frequency Analysis for Jammu City Gauging station ................................................................................................................ 28 FIGURES Figure 2.1: Tawi River Basin. ................................................................................................. 4 Figure 2.2: Land cover in the Tawi River Basin. ..................................................................... 5 Figure 3.1: Location of the existing gauging stations in Tawi River Basin. .............................. 8 Figure 3.2: Rating curve of the Jammu gauging station. ...................................................... 10 Figure 3.3: Rating curve of the Udhampur gauging station. ................................................. 11 Figure 3.4: Rating curve of Udhampur gauging station. ....................................................... 12 Figure 3.5: Rating curve of Jammu City gauging station. ..................................................... 13 Figure 4.1: Maximum flood peaks in Udhampur and Jammu gauging stations. .................... 18 Figure 4.2: Hourly stage hydrograph for a flood observed in 2005 from the sample data. .... 19 Figure 4.3: Hourly discharge hydrographs for July 2005 flood based on the rating curves ... 19 Figure 4.4: Hourly stage hydrograph for a flood observed in Udhampur on September 2014. ................................................................................................................. 20 Figure 5.1: Temporal variation of rainfall of Tawi River Basin at annual and summer monsoon scales ................................................................................................. 22 Figure 5.2: Temporal variation of maximum and minimum temperature of Tawi River Basin at monthly scale (1969-2005) ................................................................... 23 Figure 6.1: Average maximum monthly flow at Jammu gauging station (1988-2017) ........... 24 Figure 6.2: Average minimum monthly flow at Jammu gauging station (1988-2017) ............ 25 Figure 6.3: Major Nallahs in Tawi River Basin. ..................................................................... 26 Figure 6.4: Flood frequency distribution for the Udhampur gauging station. ......................... 28 Figure 6.5: Flood frequency distribution for the Jammu gauging station. .............................. 29 PHOTOS Photo 3.1: Hydrological station on Tawi River at Jammu City Bridge. .................................... 9 Photo 3.2: Hydrological station on Tawi River at Udhampur................................................. 10 III Consultancy Services for Preparing Feasibility and Detailed Project Report for Flood Mitigation and Comprehensive River Management Measures for Tawi Basin Preliminary Hydrology Report Rev. 0 – October 2018 1 INTRODUCTION The present document is the Preliminary Hydrology Report, presented as part of the Consultancy Services for preparing “Feasibility and detailed project report for flood mitigation and comprehensive river management measures for Tawi basin” under the Contract Agreement established between the Joint Venture (AQUALOGUS & OILTECH) (the Consultant) and Project Management Unit (PMU), Jhelum & Tawi Flood Recovery Project (JTFRP), Disaster Management, Relief, Rehabilitation and Reconstruction Department, Government of Jammu and Kashmir on the 29th June, 2018. The contract in question is aimed at preparing feasibility and Detailed Project Reports (DPR) for flood mitigation and river management measures in Tawi River Basin. The Chapter 2 includes a description and characterization of the Tawi River Basin. The Chapter 3 provides an analysis of the hydrology data available and presents the performed preliminary quality analysis. Additionally, this chapter also presents the additional hydrological data required for the subsequent hydrology studies. The Chapter 4 presents the review and analysis of the historic floods in Jammu & Kashmir State and particularly in the Tawi River Basin. The Chapter 5 provides a preliminary climate characterization of the Tawi River Basin. The preliminary hydrology analysis is presented in the Chapter 6, including the flood frequency analysis in the Jammu and Udhampur gauging stations. The Chapter 7 summarizes the most relevant findings obtained during the preliminary hydrology studies and includes some recommendations for upcoming studies and for the planning of flood mitigation and river management measures. Finally, the Chapter 8 includes the considered bibliography and references. 1 Consultancy Services for Preparing Feasibility and Detailed Project Report for Flood Mitigation and Comprehensive River Management Measures for Tawi Basin Preliminary Hydrology Report Rev. 0 – October 2018