摘要
山地型水库盆底地形复杂,沉积物分布空间差异大,对获取水库完整的沉积记录带来挑战。我们首次利用浅地层剖面仪,探测广东省大型供水水库水底地形和沉积记录,结果证实水库库底地形复杂多变,局部可见水下滑坡和泥沙淤积;沉积厚度由几厘米至上百厘米不等,部分区域可见明显层状结构,分辨率可达10 cm,是采取柱样的理想位置,并得到实地所采柱样剖面的证实。这说明浅地层剖面探测技术适用于研究山地型水库沉积物分布,是进行水库长期生态学野外采样的必要手段。
The complex basin topography of mountain reservoirs always brings challenge to core expanded, continuous, highly representative cores for paleoecological studies. Using a RS-QP0116 sub-bottom profiler, we tested and applied the shallow-strata profiling technology to 8 track lines in the Liuxihe Reservoir. Our results show that the reservoir bottom topography varies greatly with evidence of local underwater landslides and sediment accumulation, and that sediment thickness changes spatially from a few to more than a hundred centimeters. More importantly, ideal coring sites can be determined at where clear sediment layering of up to 10 cm in vertical resolution is seen, which was further confirmed by on-site coring. This demonstrates the shallow-strata profiler is suitable for sediment survey in mountain reservoirs, and is a necessary tool for determining sediment-coring sites in paleoecological research.
出处
《生态科学》
CSCD
北大核心
2013年第3期276-281,共6页
Ecological Science
基金
NSFC-云南联合基金<抚仙湖浮游甲壳动物的碳源及其演变>(U1033602)
关键词
浅地层剖面技术
浅地层剖面仪
流溪河水库
水底地形
沉积物空间分布
shallow-strata profiling technology
sub-bottom profiler
Liuxihe Reservoir
bottom topography
sediment spatialdistribution
