The Yellow River Delta is a region abundant in land resources, oil, natural gas, water and sand and ocean resources.
黄河三角洲拥有十分丰富的土地资源、石油天然气资源、水沙资源与海洋资源。
Whether the natural sand gravel stratum in the river bed would serve as the foundation of the superhigh faced rockfill dam or not was one of the key technical problems of the project.
河床天然砂卵砾石层能否作为超高面板坝坝基是该工程的关键技术问题之一。
Therefore, river evolution has very vital initiative and promoting effects on the formation and development of sand-dune groups and sandy land in natural conditions.
这些足以说明，在自然状况下，河流演变在沙丘群和沙地形成演化中起着非常重要的促进作用。
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