Coastline management

COASTLINE MANAGEMENT By Tran Thanh TUNG (CE/WRU) IWRP Short Course Hanoi, Vietnam January 28th, 2007 CONTENT INTRODUCTION COASTAL MODELS COASTAL MONITORING COASTAL PROTECTION (by Tuan) DISCUSSION IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG INTRODUCTION 1.1 Definition CLM 1.2 Alternatives in CLM 1.3 Method of analysis 1.4 Execution aspect IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG WHAT IS COASTLINE MANAGEMENT ? • Coastal Zone Management (integrated) -> planning and management • CLM • process of implementing a plan • Resolve conflicts (coastal users) • Objectives: • most appropriate use of Coastal Resources • legitimate IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG CLM and CZM • A part of CZM • Result of a good CZM-policy for one sector • CLM: managing a coastline in such a way that CZMpolicy can be executed • Technical means: varying (soft/hard) IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG 1.2- ALTERNATIVES IN CLM • Problems in CLM • Flooding (inundation) • Coastal erosion (loss of land) IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG COASTAL INUNDATION (alt.) • Safety (at predefine) level + Allow at high frequency (evacuation/insurance) Flood Freq Allow 1/20 US, Denmark + NOT allowed -> invest to flood defence system Flood Freq Allow 1/100 Netherlands (1/1250) IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG COASTAL EROSION (loss of land) • Retreat (allowed to erode) -> mitigate problems -> need a good set of set-back lines • Selective preservation control erosion in a selective way -> What is “important” ? What has to be protected ? -> How ? (hard/soft) • Full erosion control (no loss of land/ avoid erosion at all cost !) Fixed coastline -> REVETMENT/SEAWALL !!! • Expansion Defence System (Active/ create extra land) Where land has a very high value (economic/ecological) IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG 1.3- METHOD OF ANALYSIS Objectives + Policy Analysis Approach + Inform decision makers all aspects of alternatives COMPUTE and ESTIMATE Effect of Coastal Defence in term of cost/benefit + on social-economic + on nature, etc IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG UNITED STATES OPTIONS SELECTED Mitigation Policy Responses Evacuation Planning and other Emergency Measures in the past for Hurricane or severe storm (Severe Storm >< Chronic erosion) different political & policy problems requires Unified & Comprehensive approaches -> Management Development -> Comprehensive Policies for erosion control structures -> Beach Nourishment IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG ... Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG IWRP Training Course COASTLINE. .. nautical charts (LLWS) it vary along the coastline IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG EXAMPLE IWRP Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG • Set a Zero-point... Training Course COASTLINE MANAGEMENT By TRAN THANH TUNG 1.2- ALTERNATIVES IN CLM • Problems in CLM • Flooding (inundation) • Coastal erosion (loss of land) IWRP Training Course COASTLINE MANAGEMENT