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首页> 外文会议>第21届国际摄影测量与遥感大会(ISPRS 2008)论文集 >TEMPORAL-SPATIAL DYNAMIC CHARACTERISTIC OF VEGETATION IN THE AREA OF CASCADE HYDROPOWER STATION CONSTRUCTION IN THE UPPER REACH OF THE YELLOW RIVER
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TEMPORAL-SPATIAL DYNAMIC CHARACTERISTIC OF VEGETATION IN THE AREA OF CASCADE HYDROPOWER STATION CONSTRUCTION IN THE UPPER REACH OF THE YELLOW RIVER

机译：黄河上游梯级水电站建设区植被时空动态特征

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The hydropower station construction produced serious impacts on the regional eco-environment. The most obvious characteristics of the impacts caused by the cascade hydroelectric development are progressive, cumulative and regional. In this paper, the study area of Yellow river section from Longyangxia to Liujiaxia reservoir locates in the northwest Loess plateau of China. The remote sensing data of 1977, 1996 and 2006 were selected to analyze the temporal-spatial dynamic characteristic of regional vegetation coverage in last 30 years. The result indicated that : a) The vegetation coverage in study area was gradually improving, the main cause of the vegetation decrease was the hydropower plant construction, especially annual regulating reservoir, because of which many land use types were converted to water and the vegetation coverage decreased, b) With the increase of the altitude, vegetation increase rate rose firstly and then declined, while the change trend of vegetation decrease rate was opposite, c) The vegetation increase rate rose gradually as the distance to roads goes farther, while the nearer the vegetation was to the roads, the higher the vegetation decrease rate was. d) The decrease rate was relative to the population density and residents; but in some districts the decrease rate rose contrarily with distance to resident went farther, e) The vegetation change was highly related to the activities of human beings in the study area, f) This research demonstrated that there was no obvious evidence proved that there was correlativity between the cascade hydropower development and the regional vegetation coverage.
机译：水电站建设对区域生态环境产生了严重影响。梯级水电开发造成的影响最明显的特征是渐进性，累积性和区域性。本文从龙羊峡至刘家峡水库的黄河段研究区位于中国西北黄土高原。选择1977年，1996年和2006年的遥感数据来分析近30年区域植被覆盖的时空动态特征。结果表明：a）研究区植被覆盖度在逐步改善，植被减少的主要原因是水电厂建设，特别是年度调节水库，其原因是许多土地利用类型已转化为水，植被覆盖度大。下降; b）随着海拔的升高，植被增加率先上升然后下降，而植被减少率的变化趋势却相反，c）植被增加率随着距道路的距离增加而逐渐增加，而随着距离的增加，植被增加率逐渐升高。植被在道路上越少，植被减少率越高。 d）下降速度与人口密度和居民有关;但是在某些地区，下降的速度与离居民的距离越远相反地上升。e）植被变化与研究区域的人类活动高度相关; f）该研究表明，没有明显的证据证明存在梯级水电开发与区域植被覆盖之间的相关性。

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