摘要
由于人类的或者自然的干扰改变,景观在不同异质性土地由各种大小、形状和空间的关系中重复的相互作用,形成生态系统的组成。评估景观的转变能够理解由干扰影响生态系统的过程。因此,使用适当地图影像技术和生态定量的方法在不同干扰情形下评价估景观之变化与趋势就显得十分重要。计算景观生态指标及不同土地利用面积之变化,可以更了解此区域生态系统的特征与内涵。试验研究地区之陈有兰溪集水区,位于台湾的中央,是台湾唯一不靠海之县市,同时也是历年地震和台风等灾害受创最严重之地区,也是土壤冲蚀(土、泥石流)的敏感性地区。此研究着重于自然灾害如何影响景观型态及其变迁模式与未来研究之对策与方向。本研究透过遥感探测技术,选取不同时期之台风和地震干扰前后之景观变迁情形,经由景观生态之计算指标与多变量统计,来了解这些天然灾害对集水区生态之影响与河川上中下游,其景观型态之变化差异。希望藉由此评估景观变迁之模式,提供有关集水区生态经营与景观健康度之合理监测的参考依据。
The landscape, being changed as a result of anthropological or natural disturbance, is a heterogeneous land area composed of cluster of interacting ecosystem that is repeated in various sizes, shape, and spatial relationships. Evaluating the transition of landscape can understand that ecosystem processes are being influenced by disturbance. For this reason, it is essential that using appropriate mapping techniques and quantitative methods to assess landscape condition within different disturbance regimes. Landscape metrics were calculated for segmented areas of homogeneous land use in watershed to allow understanding and characterization of ecosystem. The Chen-Yu-Lan watershed, located in the central of Taiwan, is a sensitivity area for disaster such as earthquakes and typhoons. In this study we focus on how the natural disaster affect landscape pattern. The remote sensing technology has great potential for acquiring the detailed and accurate land use information for management and planning of watershed. Hence, we choice four time series SPOT images to evaluate the influence for watershed by earthquakes and typhoons.The study shows that landscape metrics can measure the effect of typhoon and earthquake disturbance regime. The analysis shows that evaluating landscape transition can contribute more detailed information for managing management and monitoring.
出处
《资源科学》
CSSCI
CSCD
北大核心
2006年第4期19-24,共6页
Resources Science
基金
Taiwansciencecouncil(94-2313-B-235-001)
关键词
地震
台风
景观健康度
集水区监测
Earthquakes
Typhoons
Landscape health
Watershed monitoring
