| 生态需水研究:以东辽河流域坡面系统为例 |
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| 引用本文： | 严登华,何岩,邓伟,HOU Youshun.生态需水研究:以东辽河流域坡面系统为例[J].地理学报(英文版),2003,13(4):400-407. |
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| 作者姓名： | 严登华 何岩 邓伟 HOU Youshun |
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| 作者单位： | [1]ChinaInst.ofWaterResourceandHydropower,Beijmg100044,China [2]NortheastInst.ofGeographyandAgricultmalEcology,CAS,Changchun130021,China [3]XiaoehiMiddleSchool,TaihuCounty,AnhuiProvince,Taihu246410,China |
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| 基金项目： | Key Resource and Environment Projects of CAS,No.KZ952-J1-067 |
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| 摘 要： | The ecological water demand (EWD) is the least water amount required to maintain the structure and the function of the special eco-system and the temporal scale of a study on the EWD must be a season‘s time. Based on GIS and RS with the source information of hydrological data of 46 hydrological gauges covering 52 years and the digital images of Landsat TM in 1986, 1996 and 2000, the landscape patterns, precipitation and runoff in the East Liaohe River Basin were analyzed. With the result of the above analysis, the spatial and temporal changes of the ecological water demand in the slope systems (EWDSS) of the East Liaohe River Basin (ELRB) were derived. Landscapes in the ELRB are dispersed and strongly disturbed by human actions. The hydrological regime in ELRB has distinct spatial variations. The average annual EWDSS in the ELRB is 504.72 mm (324.08-618.89 mm), and the average EWDSS in the growth season (from May to September) is 88.29% of the year‘s total EWDSS .The ultimate guaranteeing ratio of the EWDSS in ELRB is 90%. The scarce EWDSS area in the whole year and in the growth season are 60.47% and 74.01% of the entire basin respectively. The trend of scarce EWDSS area is most serious according to the quantity and area of scarce EWDSS regions.
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| 关 键 词： | GIS RS 地理信息系统 遥感技术 生态需水量 辽河盆地 倾斜系统 水量平衡 流域 |
| 收稿时间： | 9 October 2002 |
| 修稿时间： | 30 June 2003 |
Ecological water demand: the case of the slope systems in the East Liaohe River Basin |
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| YAN Denghua,HE Yan,DENG Wei,HOU Youshun.Ecological water demand: the case of the slope systems in the East Liaohe River Basin[J].Journal of Geographical Sciences,2003,13(4):400-407. |
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| Authors: | YAN Denghua HE Yan DENG Wei HOU Youshun |
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| Institution: | 1. Northeast Inst. of Geography and Agricultural Ecology, CAS, Changchun 130021, China|;
2. China Inst. of Water Resource and Hydropower, Beijing 100044, China|;
3. Xiaochi Middle School, Taihu County, Anhui Province, Taihu 246410, China |
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| Abstract: | The ecological water demand (EWD) is the least water amount required to maintain the structure and the function of the special eco-system and the temporal scale of a study on the EWD must be a season's time. Based on GIS and RS with the source information of hydrological data of 46 hydrological gauges covering 52 years and the digital images of Landsat TM in 1986, 1996 and 2000, the landscape patterns, precipitation and runoff in the East Liaohe River Basin were analyzed. With the result of the above analysis, the spatial and temporal changes of the ecological water demand in the slope systems (EWDSS) of the East Liaohe River Basin (ELRB) were derived. Landscapes in the ELRB are dispersed and strongly disturbed by human actions. The hydrological regime in ELRB has distinct spatial variations. The average annual EWDSS in the ELRB is 504.72 mm (324.08-618.89 mm), and the average EWDSS in the growth season (from May to September) is 88.29% of the year's total EWDSS .The ultimate guaranteeing ratio of the EWDSS in ELRB is 90%. The scarce EWDSS area in the whole year and in the growth season are 60.47% and 74.01% of the entire basin respectively. The trend of scarce EWDSS area is most serious according to the quantity and area of scarce EWDSS regions. |
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| Keywords: | East Liaohe River Basin slope system ecological demand water GIS & RS |
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