...
  • 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>International Journal of Environmental Research and Public Health >Detection of Critical LUCC Indices and Sensitive Watershed Regions Related to Lake Algal Blooms: A Case Study of Taihu Lake
【24h】

Detection of Critical LUCC Indices and Sensitive Watershed Regions Related to Lake Algal Blooms: A Case Study of Taihu Lake

机译：与藻类水华相关的LUCC关键指标和敏感流域区域的检测-以太湖为例

获取原文
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Taihu Lake in China has suffered from severe eutrophication over the past 20 years which is partly due to significant land use/cover change (LUCC). There is an increasing need to detect the critical watershed region that significantly affects lake water degradation, which has great significance for environmental protection. However, previous studies have obtained conflicting results because of non–uniform lake indicators and inadequate time periods. To identify the sensitive LUCC indices and buffer distance regions, three lake divisions (Meiliang Lake, Zhushan Lake and Western Coastal region) and their watershed region within the Taihu Lake basin were chosen as study sites, the algal area was used as a uniform?lake quality indicator and modeled with LUCC indices over the whole time series. Results showed that wetland (WL) and landscape index such as Shannon diversity index (SHDI) appeared to be sensitive LUCC indices when the buffer distance was less than 5 km, while agricultural land (AL) and landscape fragmentation (Ci) gradually became sensitive indices as buffer distances increased to more than 5 km. For the relationship between LUCC and lake algal area, LUCC of the WC region seems to have no significant effect on lake water quality. Conversely, LUCC within ML and ZS region influenced algal area of corresponding lake divisions greatly, while the most sensitive regions were found in 3 km to 5 km, rather than the whole catchment. These results will be beneficial for the further understanding of the relationship between LUCC and lake water quality, and will provide a practical basis for the identification of critical regions for lake.
机译：在过去的20年中，中国的太湖遭受了严重的富营养化，这在一定程度上是由于土地利用/覆盖变化（LUCC）引起的。越来越需要发现严重影响湖泊水质退化的关键流域区域，这对环境保护具有重要意义。但是，由于湖泊指标不一致和时间不足，以前的研究得出了矛盾的结果。为了确定敏感的LUCC指数和缓冲距离区域，以太湖流域内的三个湖区（梅良湖，竹山湖和西部沿海地区）及其分水岭地区为研究地点，以藻类面积为均匀湖。质量指标，并在整个时间序列中使用LUCC指标建模。结果表明，当缓冲距离小于5 km时，湿地（WL）和景观指数（如香农多样性指数（SHDI））似乎是敏感的LUCC指数，而农田（AL）和景观破碎化（Ci）逐渐成为敏感指数。缓冲距离增加到5公里以上。对于LUCC与湖泊藻类面积之间的关系，WC地区的LUCC似乎对湖泊水质没有显着影响。相反，ML和ZS区域内的LUCC对相应湖区的藻类面积影响很大，而最敏感的区域位于3 km至5 km，而不是整个集水区。这些结果将有助于进一步了解LUCC与湖泊水质之间的关系，并将为确定湖泊的关键区域提供实践依据。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号