区域地质灾害评价依赖于具体的时空尺度。由于评价因子在时间上的非线性演变规律与在空间上的非均质 性分布特征, 区域地质灾害评价必然会受尺度效应的影响。但是由于地质灾害影响因素( 例如地层岩性、地形地貌 等) 演变的相对缓慢性, 目前区域地质灾害的尺度效应主要表现为空间效应。在探讨导致区域地质灾害评价空间效 应内在因素的基础上, 分析了空间效应对区域地质灾害评价不确定性的影响机制, 对研究区域地质灾害评价的不确 定性, 提高评价的精度具有一定的理论价值与实际意义。

Evaluation of the reg ional g eolog ical hazar ds depends on the specific spatial and tempor al scale. Due to t he no nlinear e2 v olution in the tempo ral scale and heter og eneity in the spatial scale o f the ev aluatio n index es, the geo log ical haza rd assessment is inev itably impacted by the scale effect. H ow ever, t he evo lution of factor s ( such as the str atum and to po gr aphy ) is relativ ely slow , the scale effect pr esents mainly as spatial effect. Based on ana lysis o f the int ernal factor s w hich cause the spatial effect of the r egional g eolo gica l hazar ds, the influencing mechanism of spat ial effect on the uncertaint y of the reg ional geolog ical hazards assessment w as investig ated, which is of g reat sig nificance fo r the study of uncerta int y and impro vement o f ev aluatio n precisio n of reg io nal geo log ical hazards.

中国地质调查局国土资源大调查项目/ 全国主要城市环境地质综合评价0 ( 1212010535501) ; / 地下水资源数据集成与服务系统 建设0 ( 1212011120426)