臺灣博碩士論文加值系統

Wetlands are vital ecosystems that provide important ecosystem services. Human activity has contributed to the global loss of wetlands losses and reduction of diversity. In the past decade, there has been increasing attention on wetland conservation and its strategies around the world. Water and water cycling are important for wetlands; at least periodic inundation is a key factor for ecological resilience. Period, timing, and regular inundation of a wetland are important factors to determine suitable conditions for specific wetland species. Qigu salt pan was abandoned in 2002 and recognized as a wetland in 2007. This study focuses on the issue of water management in Southern Taiqu Salt Pan, located in Qigu Salt Pan wetland. Southern Taiqu Salt Pan is completely surrounded by dikes, lacks a water management plan, experiences insufficient rainfall in the dry season, and has no natural hydrological connectivity. During the dry season, the wetland frequently dries out and habitat is degraded. The aims of the present study were (1) to understand how a gate operation can help enhance wetland management; (2) to evaluate how was low intervention and high intervention scenario simulation will affect hydro pattern in Taiqu saltpan; (3) to suggest a wetland management plan incorporating gate with high and low intervention, We use field observation, gate operation, and drone remote sensing to analyze short-term water gate operations on the inundation regime with the response of habitat environments for birds species. Gate operation was carried out by operating water gate No 18 in Taiqu Salt Pan. Our research team conducted two water gate experiments for short-term water intake in Taiqu Salt Pan Wetland during dry season and high tide. The first experiment was designed to understand how the current infrastructure will allow water flows into the whole study area, which was abandoned in 2002. The second experiment was designed to see how water connectivity and flow changed after low-impact restoration of channel infrastructure occurred. Each gate operation experiment for water intake was based on the initial hydrological condition within the wetland and the tides. The experiments show a positive impact on habitat due to an increase of water, and bird species in salt pan. Our study shows that sustainable water management techniques through gate operation and engineering approach have the potential to improve wetland habitat during the dry season.

Abstract II
Acknowledgments III
List of Tables VII
List of Figure VIII
Chapter 1 Introduction 1
1.1 Background 1
1.2 Motivation and Purpose 1
1.3 Architecture of Article 3
Chapter 2 Literature Review 5
2.1 Wetland Definition and Value 5
2.1.1 Wetland definition 5
2.1.2 Wetland Classification 5
2.2 Wetland Degradation and Restoration 8
2.2.1 Wetland Loss Trend 8
2.2.2 Environmental factors affecting waterbird habitat 9
2.2.3 Case Study of wetland restoration 10
2.3 Physical Inundation Drainage Model 12
2.4 Summary 14
Chapter 3 Research Methodology 16
3.1 Study Area 16
3.1.1 Geographic Overview 17
3.1.2 Hydrological Overview 17
3.1.2.1 Drainage 17
3.1.2.2 Precipitation 18
3.2 Data Collection 18
3.2.1 Water depth 19
3.2.2 Tide Level 20
3.2.3 Elevation 21
3.2.4 Bird survey 21
3.3 Water Gate Operation 22
3.3.1. Inflow Operation 22
3.3.2. Equation for estimating geological flow 23
3.4 Physiographic Drainage-Inundation (PHD) model 23
3.4.1 Grid Layout 24
3.4.2 Basic equation of quasi two-dimensional flow 25
3.4.2.1 River flow type connection 26
3.4.2.2 Weir connection 26
3.4.2.3 Box culvert 27
3.4.3 Calibration and Verification 28
3.5 Scenario Design 28
Chapter 4 Result 30
4.1 Field observation result 30
4.1.1 The elevation of Taiqu Salt pan in Qigu 30
4.1.2 Survey and Interview Result 31
4.1.3 Tidal Surges in Taiqu 33
4.2 Gate operation 36
4.2.1 March Gate Operation 36
4.2.2 April Gate Operation 39
4.2.3 Bird Response Before and After Water Intake Gate Operation in March and April 40
4.3 Physical inundation drainage model 44
4.3.1 Model grid result 44
4.3.2 Model calibration 44
4.3.3 Model verification 46
4.3.4 Simulation results of each scenario in Taiqu salt pan 47
4.4 Summary 59
Chapter 5 Discussion 60
5.1 Evaluation of current gate operations to enhance habitat-oriented plan 60
5.2 Water depth efficient comparison of low intervention and high intervention 61
5.3 Wetland management plan 63
Chapter 6 Conclusion and Suggestion 65
6.1 Conclusion 65
6.2 Suggestion 66
Reference 67
APPENDIX A Taiqu Salt Pan Water Connectivity Condition in April 69
APPENDIX B Water Area Coverage of each day 78
APPENDIX C Aerial Photo of Water Area in Taiqu Salt Pan 79

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