丹江口水库对汉江中下游水文情势的影响

以汉江中游的襄阳水文站1946~1995年日均流量资料为研究对象,采用变动范围分析(RVA)法分析了丹江口水库建库前后汉江中下游水文情势特征变化,定量评价了水文情势改变程度.结果表明,丹江口水库对汉江中下游河流水文改变程度为39%,属于中度改变.水文情势的改变,影响了水库下游重要生物资源的生态环境条件,破坏了河流生态系统完整性以及生物多样性,建议尽快改变现有水库调度模式,开展丹江口水库生态调度研究.     

优化调度改善三峡水库生态环境

三峡工程规划设计以来,边界条件发生很大变化,研究认识也在不断深入,生态环境保护成为重要议题。三峡工程需要改进调度方式,以便更好地发挥工程防洪、发电和航运等综合效益,同时更好地改善水库上下游生态环境。建议三峡汛期按动态汛限水位和非汛期加大日调节幅度的方式调度,以提高工程综合效益,利于库区和下游生态环境和减淤。     

Relationship between the temporal-spatial distribution of archaeological sites and natural environment from the Paleolithic Age to the Tang and Song Dynasties in the Three Gorges Reservoir of Chongqing area

The temporal-spatial distribution features including time distribution,horizontal and vertical spatial distribution of archaeological sites from the Paleolithic Age to the Tang and Song Dynasties in the Three Gorges Reservoir of Chongqing area are analyzed based on GIS spatial analysis.The successive pollen record of deposited peat stratum since the Paleolithic Age in the Dajiuhu Basin of Shennongjia is used in combination with the research of the historical environmental evolution to reconstruct the Paleoenvironment in the Three Gorges Reservoir of Chongqing area.Through the comparison of the temporal-spatial distribution of the archaeological sites and the natural environment,the relation between the distribution of the archaeological sites and the natural environment evolution and disaster changes from the Neolithic Age to the Tang and Song Dynasties has been discussed.Study shows that 677 archaeological sites from the Paleolithic Age to the Tang and Song Dynasties in the Three Gorges Reservoir of Chongqing area increase gradually from west to east and from high land to low land.Most of the sites are distributed along the river and aggregated at the confluence.Obviously,the altitudes of archaeological sites in the Paleolithic Age and the Neolithic Age are much higher than those of historical sites.The analysis suggests:(1)the human beings of every times would like to choose the first or the second river terrace as living sites which are nearer to the water source and are easier to with- stand flood.The pre-historical sites of earlier ages are often located at the higher altitude place because of the tectonic uplift and downcutting of rivers since Holocene.(2)Due to the rugged terrain in Chongqing area,most of the sites are located along the river sides,for example,the wide river valley and terrace,which could provide wider living space caused by the lateral erosion and deposition of the river course.(3)The early residents mainly relied on fishing,hunting and agriculture,and the rugged terrain of the mountaino     

张峰水库工程左岸塌滑体排水洞设计张峰水库工程左岸塌滑体排水洞设计

根据张峰水库左岸塌滑体的工程地质条件等，给出了塌滑体排水洞的具体设计方案。     

郭庄水库碾压石坝施工质量控制方法

以郭庄水库土石坝施工为例,详细阐述了土石坝工程的施工方法、施工质量控制措施以及施工中应重点注意的问题。     

对油娄山水库工程不合理性的思考

对拟建的油娄山水库工程的不合理性进行了分析,包括滹沱河灌区的用水权难以保障、水资源开发配置不合理、滹沱河污染将进一步加剧、忻定盆地的地下水漏斗将迅速扩大等,在此基础上得出了该工程不宜立项的结论。     

柏叶口水库泄洪发电洞围岩稳定性评价

根据《水利水电工程地质勘察规范》对隧洞围岩进行了工程地质分类,对隧洞涌水、围岩稳定性进行了评价,并提出了相应的处理措施。     

杜寨水库溢洪道改造措施

简述了杜寨水库的概况,分析了杜寨水库溢洪道的现状及存在的问题,从工程任务和规模、工程总体布置及主要建筑物等方面,详细介绍了溢洪道改造的方法及措施.     

申村水库副坝坝体质量及副坝段主要工程地质问题评析

在收集工程地质勘察资料的基础上,对该申村水库副坝坝体质量及副坝段主要工程地质问题进行了评析.     

横泉水库供水发电洞泄流计算分析

介绍了横泉水库工程概况,论述了供水发电洞进水塔孔口设置,对供水发电洞泄流进行了计算。