基于三眼峪特大泥石流降水特征的灾后重建工程设防标准的讨论  

Discussion on Fortification Standard of Post-Disaster Reconstruction Projects Based on Rainfall Characteristicsof Sanyanyu Extremely Big Debris Flow

作　　者：朱立峰[1] 胡向德 于国强[1] 李政国[1] 丛凯 孙鑫 

机构地区：[1]中国地质调查局西安地质调查中心,西安710054 [2]甘肃省地质环境监测院,兰州730020

出　　处：《西北地质》2011年第3期122-126,共5页Northwestern Geology

基　　金：国土资源大调查计划项目"西北黄土高原区地质灾害详细调查"(1212010640330);国家自然科学基金项目(40872208);国土资源大调查项目"小秦岭金矿区环境地质问题调查与评价"(1212010741003)资助

摘　　要：舟曲"8.8"特大山洪泥石流灾害损失惨重,举世瞩目,灾难发生后泥石流隐患依然存在,灾后重建中面临的第一个难题便是灾后重建工程设防标准的确定问题。通过分析激发"8.8"舟曲特大山洪泥石流灾害降水的时间与空间分布特征,认为本次降水具有强度大、历史短,局地性强的特征。基于此,建议灾后重建工程的泥石流综合治理工程设计中应充分根据本次降水的特征,考虑最不利的极端条件下即按此次降水雨强涵盖整个三眼峪流域范围所产生的最大流量。Zhouqu ＂8, 8＂ extremely big debris flow caused severe damages and has been the world focus. Potential debris flows still exist after the ＂8.8＂ disaster. The first difficulty that the government faces during post-disaster reconstruction phase is the determination of the fortification standard of the reconstruction works. Based on the analysis of the temporal and spatial distribution characteristics of the rainfall which triggered the ＂8.8＂ Zhouqu extremely big debris flow, we found that the rainfall has characteristics such as being heavy, short duration and obvious local variations. Based on the above, it is suggested that the characteristics of the rainfall should be fully considered in the design of comprehensive treatment projects of debris flow during post-disaster reconstruction phase. That is to take the condition when the whole Sanyanyu is covered by the same rainfall magnitude of this time as the most unfavorable extreme circumstance to calculate maximum flow.

关 键 词：泥石流 降水特征 时空分布 设防标准 

分 类 号：P642[天文地球—工程地质学]