浙江东南沿海地区,在许多河流的中下游河谷地带,多有深厚砂砾石层覆盖。由于地形上适于选作坝址,已陆续在这类地基上修建了许多土坝工程,其中大、中型水库土坝有18座。 The southeastern coastal areas of Zhejiang are covered by deep gravel layers in the middle and lower reaches of many river valleys. Due to the terrain suitable for selection as a dam site, many earth dam projects have been completed on such foundations, of which 18 are large and medium-sized dams.