• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文会议>Remote sensing for agriculture, ecosystems, and hydrology XV >Monitoring Gully Erosion at Nyaba River of Enugu State Southeastern Nigeria, Using Remote Sensing
【24h】

Monitoring Gully Erosion at Nyaba River of Enugu State Southeastern Nigeria, Using Remote Sensing

机译：使用遥感监测尼日利亚东南部埃努古州纳亚巴河的沟壑侵蚀

获取原文
获取原文并翻译 | 示例
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Erosion is a natural, gradual and continuous process of earth surface displacement caused by various agents of denudation. It is also caused by some anthropogenic activities. Erosion rate of an area at any point in time is dependent mainly on climate and geological factors. Physical aspects of the erosive force experienced in gullies are mainly dependent on the local prevailing climate condition. In this study, remotely sensed data was used in the analysis of gully erosion progression at Nyaba River in Enugu Urban, aimed at mapping and monitoring gully erosion at the study site. Methodologies employed include; data acquisition from field observation and satellite images; data processing and analyses using ilwis 3.7 and Arc GIS 9.3 software. The result showed that gully progressed from 578,713,735 square meters in 1986 to 1, 002,819,723 in 2011. Prediction showed that the magnitude of the gully area is expected to increase as the years go by if measures are not taken to control the expansion rate. The forecast put the expected coverage of gully erosion at Nyaba River to be 45,210,440 square meters by the year 2040. Consequently, recommendations made include: constant monitoring to detect early stages of gully formation; regulation of grazing of pasture in the area; restriction of sand mining from the river bank and construction of water ways to stabilize river flow. In conclusion, monitoring clearly showed that there was a geometric progression in gully formation at Nyaba over years; the expansion was aided more by anthropogenic activities than natural factors.
机译：侵蚀是由各种剥蚀剂引起的自然，逐渐和连续的地球表面位移过程。它也是由某些人为活动引起的。一个地区在任何时间点的侵蚀率主要取决于气候和地质因素。沟渠中遭受的侵蚀力的物理方面主要取决于当地的主要气候条件。在这项研究中，使用遥感数据分析了Enugu Urban的Nyaba河的沟壑侵蚀进展，旨在绘制和监测研究地点的沟壑侵蚀。所采用的方法包括：从实地观察和卫星图像获取数据；使用ilwis 3.7和Arc GIS 9.3软件进行数据处理和分析。结果表明，沟渠面积从1986年的578,713,735平方米增加到2011年的1,002,819,723平方米。预测表明，如果不采取措施控制扩张速度，沟渠面积的大小将随着时间的流逝而增加。预测表明，到2040年，尼亚巴河的沟壑侵蚀预计覆盖面积为45,210,440平方米。因此，提出的建议包括：持续监测以发现沟壑形成的早期阶段；调节该地区牧场的放牧；限制从河岸进行采砂，并建设水路以稳定河水。总之，监测清楚地表明，多年来尼亚巴（Nyaba）的沟渠形成呈几何级数增长。人为活动比自然因素更多地促进了扩张。

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