腾龙洞造成的洪涝灾害及治理方案的优选

湖北省利川市毗邻清江,其下游腾龙洞清江伏流段阻流壅水严重,影响到了城区.本文通过对腾龙洞形态结构特点及其周围地质环境的研究,认为该地下河入口(落水洞)至银河洞尾一段过水断面狭窄,阻流壅水是造成利川市城郊遭受水灾的主要原因.治理时,以隧道加溶洞方案最为经济     

The study on a new technology of waterway information system

It is a lot limitations to survey and design waterway by the CAD technique,due to timely variation of hydrology and ecology in the complicated estuary area,such as Changjing River estuary.In this paper,the advantages of GIS technique is applied to manage and process the multi kind,multi scale and multi time hydrographic parameters,including water depth,current velocity,tidal,waves,wind speed,temperature and salinity etc.,also to deal with different projection,different scale charts.Meanwhile,in the paper,combination techniques of GIS and CAD has been developed for unification of the charts for efficient management,two-way automatic carts conversion between GIS and CAD,automatic cutting and assemble of a number of Charts,flight path of the projection of spatial data and coordinate transformation.This new technique has been applied to survey and design waterway of Changing River estuary.The result shows that the combination technology of GIS and CAD has application potentiality in the waterway survey and design.     

Coastline configuration and geomorphologic development mode of arc-shaped coast in South China

1IntroductionArc-shaped bays are quite common on exposed sediment coast in South China, where the crenulate-bay beaches occur with the presence of two consecutive headlands and a predominant wave approach oblique to the alignment of the upcoast and downcoast headlands (Yasso, 1965). Oblique persistent swell striking a shoreline transports sediment alongshore and sculptures a coast into arc-shaped beaches. The shoreline of beach appearance mainly consists of straight segment and shadow segment…     

长江口日本沼虾繁殖群体生物学研究

对2006年6,7,8,10,12月长江口日本沼虾的生殖生物学进行初步研究。测定其头胸甲长、体质量、指节、性腺指数、肝胰腺指数、分析头胸甲长和体质量之间的关系,性腺指数、肝胰腺指数与体质量的相关性。结果表明,日本沼虾主要分布在1.25～2.00mm,体质量分布在2.0～4.0g。头胸甲长与体质量线性相关,指节和头胸甲为正相关,性腺及肝胰腺与体质量及头胸甲长呈正相关,对雌性发育分期进行划分。绝对生殖力4977,相对生殖力1000～2000,雌性生殖力与头胸甲长和体质量正相关,相关方程分别为y=315.47e1.6578x;y=1511.9e0.3251x。     

TGQ-30型轻便取样钻机及其在低山丘陵地区的应用

介绍了TGQ-30型取样钻机的结构设计、主要技术参数和特点;详细探讨了与该钻机配套的钻具及取样器;总结了该设备在我国南方低山丘陵地区应用取得的经验成果,提出使用过程中的注意事项。为该地区工作的进一步开展提供有益借鉴。     

重庆大学危岩锚固工程简介

重庆大学18层高层建筑物拟建在嘉陵江高陡斜坡脚下,斜坡上部陡崖为侏罗系上沙溪庙组巨厚层砂岩,岩石原生及岸剪裂隙发育,危岩直接威胁着建筑物。川地208队采用锚杆加固及涂抹砂浆水泥护坡综合防治工程,效果明显。