道路对景观的影响及其生态风险评价--以澜沧江流域为例

道路贯穿于各类景观。道路网络的发展也产生了许多生态效应。道路的生态风险分析是基于生态效应，通过格局和过程的研究，综合评估各类潜在生态影响及其累积性后果。从景观生态学理论入手．分析了道路对景观的影响，将道路对景观的影响区分为建设期和运营期2个阶段，并提出了基于格局和过程的生态环境指数，进而得出道路综合生态风险评价的方法。以澜沧江流域上中下游的3个典型区为例，研究道路对景观的影响。结果表明，虽然不同案例区道路影响的景观类型和格局不同，其风险的分布也不同．但综合风险指数和道路密度具有很高的一致性。

Effects of road on landscape and its ecological risk assessment: A case study of Lancangjiang River valley

Road and road networks bring forth many ecological effects, as they run through all kinds of landscapes, while road ecological risk analysis is to comprehensively assess various potential ecological effects and their accumulative effects trough pattern and process research. Focused on the impact of roads on landscape, the road effects were divided into construction period and passage period, with two indexes based on different effects on pattern and process to describe the effects put forward and the comprehensive ecological risk index deduced. Taking three case areas at upper, middle, and lower reaches of Lancanjiang River valley as examples, this paper analyzed that the road impact on landscape, and calculated their ecological risk index. The results indicated that though ecological risk distributed differently in each area, road density had high positive linear correlations with risk indexes.