| 作者简介 | 第7-9页 |
| 摘要 | 第9-14页 |
| ABSTRACT | 第14-18页 |
| Chapter 1 Introduction | 第22-38页 |
| 1.1 Background and Significance of the Research | 第22-24页 |
| 1.2 Surface water-groundwater interaction | 第24-29页 |
| 1.2.1 Characterization of SW-GW interaction | 第24-25页 |
| 1.2.2 Quantification of SW-GW interaction | 第25-29页 |
| 1.3 Ammonium geochemistry | 第29-33页 |
| 1.3.1 Geochemical behavior of ammonium in SW-GW system | 第29-30页 |
| 1.3.2 Nitrogen isotope geochemistry | 第30-33页 |
| 1.4 Jianghan Plain | 第33-37页 |
| 1.4.1 Geology and Hydrogeology | 第33-34页 |
| 1.4.2 SW-GW interaction | 第34-36页 |
| 1.4.3 Nitrogen pollution | 第36-37页 |
| 1.5 Objectives of the research | 第37-38页 |
| Chapter 2 The indications of environmental tracers to surface water-groundwater interactions in Jianghan Plain | 第38-50页 |
| 2.1 Introduction | 第38页 |
| 2.2 Methods | 第38-40页 |
| 2.2.1 Field sampling | 第38-39页 |
| 2.2.2 Chemical analysis | 第39-40页 |
| 2.3 Results and discussions | 第40-48页 |
| 2.3.1 Hydrochemistry | 第40-46页 |
| 2.3.2 Hydrogen and oxygen isotopes | 第46-47页 |
| 2.3.3 Tritium distribution | 第47-48页 |
| 2.4 Summary | 第48-50页 |
| Chapter 3 Characterizing surface water-groundwater interactions in the interior of Jianghan Plain | 第50-73页 |
| 3.1 Introduction | 第50-52页 |
| 3.2 Methods | 第52-60页 |
| 3.2.1 Hydrogeologic simulation | 第52-55页 |
| 3.2.2 Hydrogeologic calculation | 第55页 |
| 3.2.3 Collection and modeling of tritium data | 第55-60页 |
| 3.3 Results | 第60-66页 |
| 3.3.1 Results from hydrogeologic simulation | 第60-62页 |
| 3.3.2 Vertical fluxes based on hydrogeologic calculation | 第62-64页 |
| 3.3.3 Groundwater residence time and exchanging flux based on OTIS model | 第64-65页 |
| 3.3.4 Groundwater residence time and vertical flux based on the dispersion model | 第65-66页 |
| 3.4 Discussions | 第66-71页 |
| 3.4.1 General characteristics of SW-GW interactions in the interior of JHP | 第66-69页 |
| 3.4.2 Links to water quality in JHP | 第69-71页 |
| 3.5 Summary | 第71-73页 |
| Chapter 4 Sources and fate of high levels of ammonium in surface water and shallow groundwater of the Jianghan Plain, Central China | 第73-88页 |
| 4.1 Introduction | 第73-74页 |
| 4.2 Method | 第74-77页 |
| 4.2.1 Field sampling | 第74-75页 |
| 4.2.2 Chemical and isotopic measurements | 第75-77页 |
| 4.3 Results and discussions | 第77-87页 |
| 4.3.1 Distribution of ammonium in surface water and shallow groundwater | 第77-79页 |
| 4.3.2 ~(15)N signatures to identify sources and fate of ammonium | 第79-85页 |
| 4.3.3 Environmental indication | 第85-87页 |
| 4.4 Summary | 第87-88页 |
| Chapter 5 Effect of seasonal hydrologic changes on ammonium behavior in shallow groundwater at Jianghan Plain | 第88-103页 |
| 5.1 Introduction | 第88-89页 |
| 5.2 Materials and methods | 第89-91页 |
| 5.2.1 Field site | 第89页 |
| 5.2.2 Sediment characterization | 第89-90页 |
| 5.2.3 Monitoring of water level and water chemistry | 第90-91页 |
| 5.3 Results and Discussions | 第91-102页 |
| 5.3.1 Seasonal variations of hydrology and hydrochemistry | 第91-94页 |
| 5.3.2 Nitrogen species and isotope of sediments | 第94-95页 |
| 5.3.3 Seasonal variation of nitrogen species | 第95-97页 |
| 5.3.4 Seasonal variation of nitrogen isotope in ammonium | 第97-99页 |
| 5.3.5 Effect of hydrologic changes on ammonium behavior | 第99-102页 |
| 5.4 Summary | 第102-103页 |
| Chapter 6 The mass balance of ammonium in surface water - hyporheic zone - groundwater system in a typical N-contaminated stream reach at Jianghan Plain | 第103-119页 |
| 6.1 Introduction | 第103-104页 |
| 6.2 Materials and Methods | 第104-106页 |
| 6.2.1 Field site | 第104页 |
| 6.2.2 Sampling and measurement of streambed sediment | 第104-106页 |
| 6.2.3 Tracer experiment | 第106页 |
| 6.3 Results | 第106-112页 |
| 6.3.1 Sediment characteristics | 第106-108页 |
| 6.3.2 Hyporheic-zone characterization | 第108-112页 |
| 6.4 Discussions | 第112-117页 |
| 6.4.1 Contribution of hyporheic zone to ammonium mass balance | 第112-114页 |
| 6.4.2 Difference of hydro-biochemistry for the stream center and margin | 第114-117页 |
| 6.5 Summary | 第117-119页 |
| Chapter 7 Conclusions and suggestions | 第119-123页 |
| 7.1 Conclusions | 第119-122页 |
| 7.2 Suggestions | 第122-123页 |
| Appendix | 第123-128页 |
| Acknowledgement | 第128-130页 |
| Reference | 第130-145页 |
