북몽골 월경성 하천유역 수질환경 및 오염에 대한 한-몽골 공동연구

Title
북몽골 월경성 하천유역 수질환경 및 오염에 대한 한-몽골 공동연구
Authors
이영준
Co-Author
윤승택; Badarch; Mendbayar; 이정호; Ayur Ochirsukh; 권장순; 김덕민
Issue Date
2006-08-30
Publisher
한국환경정책·평가연구원
Series/Report No.
정책보고서 : 2006-01
Page
61 p.
URI
http://repository.kei.re.kr/handle/2017.oak/19262
Language
영어
Keywords
Watersheds
Abstract
Twenty-nine and twenty-seven water samples were collected during October 7 to 10, 2005 and June 10 to 15, 2006, respectively in order to examine the surface water quality in central northern Mongolia related to the effect of mining. Major dissolved constituents in surface waters are mostly derived from rock weathering, which is accelerated by mining activity. The hydrogeochemical analysis indicates that the water-rock (soil) interaction with lesser effect of anthropogenic contamination controls the major ion chemistry of surface waters. Very high turbidity caused by abundant suspended particles (mainly mineral grains) is one of the major concerns in this area, which is caused by strong erosion of river banks in meandering river systems, overgrazing by animals, and human activities such as agriculture, cultivation and mining. In the Zaamar gold mining area of Mongolia, the Tuul river water is highly turbid due to the disturbance of sediments and soils by placer gold mining activity and would adversely affect the riparian environmental system. The chemistry of surface water in the Khangal River is affected by the oxidation of sulfide minerals in relation to the mining of porphyry Cu(-Mo) ores. These rivers are merged to the Selenge River in downstream area and may eventually influence the environment of the Baikal watershed to cause a significant transboundary environmental problem. Although water quality problem in geochemical aspect due to mining is not significant at present, it should be continuously examined to minimize the transboundary movement of potential aquatic contaminants. It is, therefore, essential to develop a sustainable monitoring system to establish a water quality management plan for transboundary watershed environment in the Northern Mongolia along with the conservation of the Lake Baikal.

Table Of Contents

Chapter 1. Introduction
Chapter 2. Study Area
1. Climate
2. Geology
3. Mineral Occurrences and Major Mineral Deposits
A. Gold (Au)
B. Placer gold deposits in Zaamar area
C. Copper (Cu)
D. Erdenet copper deposit
Chapter 3. Sampling and Analyzing Procedures
Chapter 4. Results
1. Physicochemical properties of river water
A. pH
B. Turbidity
2. Hydrochemical classification: water type
3. Temporal and spatial variations of physicochemical data
A. Temporal variation
B. Spatial variation
4. Lithologic control of water chemistry
5. Heavy metals in water samples
6. Environmental Isotopic Study
A. N isotopes of nitrate
B. S isotopes of sulfate
Chapter 5. Discussion
1.Water quality of the Selenge River regarding transboundary transport of contaminants
2.Future work: Integrated river-basin management for the Selenge River Basin
Chapter 6. Summary
References
Appendix 1: GPS Position of sampling sites
Appendix 2: Maps of sampling sites
Appendix 3: Agreement of Collaborative Research 59
Abstract in Korean

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