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(1)建设项目区自然条件。水利水电工程开发规律是先易后难,前期开发的工程在地理位置、气候、水资源、土地资源、地形、地质和施工条件等方面都比较优越,因而投资省;而后期兴建工程项目的上述各种条件相对较差,建设难度加大,因而投资也较多。以甘肃省两个水库工程为例,平凉崆峒水库和庄浪竹林寺水库均为心墙砂砾坝,前者1980年12月建成,总库容2970万m~3,单位库容土石方量和造价分别为0.15m~3和
(1) The natural conditions of the construction project area. The laws governing the development of water conservancy and hydropower projects are easy to tackle first and foremost. Projects developed in the early stage are superior in terms of location, climate, water resources, land resources, topography, geology and construction conditions, thus saving investment. In the latter stage, Various conditions are relatively poor, more difficult to build, so more investment. Taking the two reservoir projects in Gansu Province as an example, both the Pingliang Yulong Reservoir and Zhuanglang Zhulin Temple Reservoir are core-gravel dams. The former was completed in December 1980 and has a total storage capacity of 29.7 million m 3. The unit volume of earth and rock and the cost of construction are 0.15m ~ 3 and