| 引用本文: | 北纲豪一,S. Horiuchi,M. Watanabe,奥田节夫.用氚讨论中国西部新疆干旱区的水循环率.湖泊科学,1998,10(s1):563-578. DOI:10.18307/1998.sup57 |
| K. Kitaoka,S. Horiuchi,M. Watanabe,S. Okuda.Water Circulation Rates in Arid Regions of Xinjiang,Western China, from the Viewpoint of Tritium. J. Lake Sci.1998,10(s1):563-578. DOI:10.18307/1998.sup57 |
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| 用氚讨论中国西部新疆干旱区的水循环率 |
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北纲豪一1,2, S. Horiuchi3,2, M. Watanabe4,2, 奥田节夫5
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1.Faculty of Science, Kyoto University;2.Japan;3.College of Humanities, Nihon University;4.Faculty of Letters and Education, Ochanomizu University;5.Faculty of Science, Okayama University of Science. Japan
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| 摘要: |
| Tritium concentrations are used to trace water circulation in the Urumqi and Turfan basins in the Xinjiang, western China. Tritium analyses were made for 77 water samples of river waters, groundwaters, spring waters, lake waters and glacier ice collected in summers in 1992 and 1994. The tritium concentrations in the waters are in a wide range from 0 to 125 TU, most of which are considerably high compared with those of most waters in Japan, because tritium levels in precipitation in the area are over ten times as high as those in Japan. River waters originating in glacier regions contain melt glacier, the proportion of which is over 0.5 to river water. The mean resi-dence time of circulating meteoric water in the mountain regions is estimated to be about 15 years. Most groundwaters and spring waters in the flat regions are mainly derived from river waters originating in glacier regions. The groundwater of greatest tritium concentrations in wells in Urumqi City is derived from Urumqi River about 25 years ago. It takes several ten years for river water to pass the underground to many springs. Some groundwaters and spring waters have taken a long time more than 40 years to travel under the ground. Enrichment of tritium in lake water by evaporation is considered to estimate the contribution of groundwater flow to the recharge of lake. Various contributions of groundwater to lakes are inferred for the various type of salinity in closed or semi-closed lakes. The inflow rates of groundwater to salt lakes are small as against fresh water lakes. |
| 关键词: Urumqi water circulation tritium residence time |
| DOI：10.18307/1998.sup57 |
| 分类号: |
| 基金项目: |
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| Water Circulation Rates in Arid Regions of Xinjiang,Western China, from the Viewpoint of Tritium |
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K. Kitaoka1,2, S. Horiuchi3,2, M. Watanabe4,2, S. Okuda5
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1.Faculty of Science, Kyoto University;2.Japan;3.College of Humanities, Nihon University;4.Faculty of Letters and Education, Ochanomizu University;5.Faculty of Science, Okayama University of Science. Japan
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| Abstract: |
| Tritium concentrations are used to trace water circulation in the Urumqi and Turfan basins in the Xinjiang, western China. Tritium analyses were made for 77 water samples of river waters, groundwaters, spring waters, lake waters and glacier ice collected in summers in 1992 and 1994. The tritium concentrations in the waters are in a wide range from 0 to 125 TU, most of which are considerably high compared with those of most waters in Japan, because tritium levels in precipitation in the area are over ten times as high as those in Japan. River waters originating in glacier regions contain melt glacier, the proportion of which is over 0.5 to river water. The mean resi-dence time of circulating meteoric water in the mountain regions is estimated to be about 15 years. Most groundwaters and spring waters in the flat regions are mainly derived from river waters originating in glacier regions. The groundwater of greatest tritium concentrations in wells in Urumqi City is derived from Urumqi River about 25 years ago. It takes several ten years for river water to pass the underground to many springs. Some groundwaters and spring waters have taken a long time more than 40 years to travel under the ground. Enrichment of tritium in lake water by evaporation is considered to estimate the contribution of groundwater flow to the recharge of lake. Various contributions of groundwater to lakes are inferred for the various type of salinity in closed or semi-closed lakes. The inflow rates of groundwater to salt lakes are small as against fresh water lakes. |
| Key words: Urumqi water circulation tritium residence time |
