Study of irregular wave run-up over fringing reefs based on a shock-capturing Boussinesq model     

《Applied Ocean Research》2019

This paper presents the results of a parametric study of irregular wave run-up over fringing reefs using the shock-capturing Boussinesq wave model Funwave-TVD to better understand the role of fringing reefs in the mitigation of wave-driven flooding. Laboratory experiments were newly performed with a typical fringing reef profile and typical hydrodynamic conditions to validate the model. Experimental data shows irregular wave run-ups are dominated by the low-frequency motions and confirms the run-up resonant phenomenon over the back-reef slope, which has been revealed in previous numerical studies. It is demonstrated that irregular wave evolution and run-up over fringing reefs are reasonably reproduced by the present model with a proper grid size. However, the infragravity run-up height and highest 2% run-up height over the back-reef slope are under-predicted due to the underestimation of the infragravity wave height over the reef flat. The validated model was then utilized to model irregular wave transformations and run-ups under different conditions. Through a series of numerical experiments, the effects of key hydrodynamic and reef geometry parameters, including the reef flat width, water depth over the reef flat, fore-reef slope angle and back-reef slope angle, on the irregular wave run-up were investigated. Variations of spectral components of irregular wave run-ups were examined to better understand the physical process underlying the effect of each parameter.  相似文献   

AN INTEGRATED APPROACH TO AIR MASS CLASSIFICATION IN THE NORTH CENTRAL UNITED STATES     

Mark D. Schwartz 《The Professional geographer》1991,43(1):77-91

Both subjective and objective schemes for air mass classification offer advantages to climatological studies. An integrated approach is developed and applied to 850 mb level data in the north central United States. Each air mass type was initially delimited by a subjective analysis. Final limits were then determined with an objective technique that separates temperature curves into normal components based on interpretation from the subjective method. Continental air was most frequent in all seasons except summer. The methodology also allows estimation of classification error.  相似文献   

On least squares estimation of generalized covariance functions     

Angelika van der Linde 《Mathematical Geology》1993,25(1):1-7

Least squares estimation (LSE) is theoretically related to quadratic unbiased estimation of variance components. It is argued that these methods of estimation of variance components essentially generalize LSE though they are not formally equivalent.  相似文献   

盘山山前地下水与矿泉水污染成因分析   总被引：4，自引：0，他引：4  

李学美  赵子军  崔亚莉  刘雪松  卢长军 《水文地质工程地质》2008,35(1):112-116

文章利用主成分分析方法,结合揭示变量和样品之间在成因或空间上联系的对应分析,通过SPSS统计分析软件,对盘山山前地区地下水和矿泉水污染成因进行分析。研究表明,盘山山前存在地下水和矿泉水污染;局部范围的污染主要是由于食品厂等企业的排污引起的,污染成分主要是Cl-和NO3—N,主要污染地区是塔院地区,其次是西大佛塔至南营,污染程度与至污染源的距离有关;大部分地区存在三氮面状污染,农业氮肥的施用是其主要原因。  相似文献   

大黄鱼皮肤溃烂病病原的研究   总被引：3，自引：0，他引：3  

纪荣兴  邹文政  李印龙 《海洋科学》2004,28(11):57-60

从福建省厦门西海域某渔排养殖大黄鱼(Pseudosciaena cyogga)患皮肤溃烂病的肝脏、肌肉分离到2株优势菌。人工感染试验证实其中1株为致病菌。该菌的主要生理生化特性为革兰氏阴性，短杆状，极生单鞭毛，发酵葡萄糖，氧化酶阳性，赖氨酸脱羧酶、鸟氨酸脱羧酶阳性，精氨酸脱羧酶、水杨素、枸橼酸盐阴性，不产生H2S，利用葡萄糖、甘露醇产酸，对O／129(10μg)不敏感。在含0％，10％NaCl的普通培养基上不生长；在含2％，4％，6％，8％NaCl的普通培养基中生长；在温度30，35，40℃下生长良好，但4℃不生长。初步鉴定该病原菌为副溶血弧菌(Vibrio parahaemolyticus)。药敏试验表明，该菌对卡那霉素、复方新诺明、链霉素等10种药物敏感，对青霉素G、氨苄青霉素、利福平等6种药物不敏感。  相似文献   

几种养殖鲍同工酶生化遗传的比较研究   总被引：8，自引：0，他引：8  

柯才焕  陈晓佳  周时强  王志勇  王艺磊 《台湾海峡》2003,22(2):173-179,T002

运用聚丙烯酰胺凝胶电泳对我国主要养殖鲍(皱纹盘鲍、盘鲍及九孔鲍)12种同工酶(LDH、ME、MDH、GPI、PGM、IDH、IDDH、SOD、EST、ODH、ADH、AAT)26个基因座位进行了分析．结果表明：EST、PGM可以作为区分三种(亚种)鲍的生化遗传标记；在所分析的位点中，未发现多态现象，表明三种养殖鲍杂合子缺失严重，其主要原因可能在于哑基因、近交与自然选择。  相似文献   

珠江三角洲网河区水位变化趋势研究   总被引：4，自引：0，他引：4  

沈焕庭  杨清书  罗宪林  罗章仁  杨干然  欧素英 《海洋学报》2002,24(2):30-38

根据珠江三角洲网河区29个验潮站的实测验潮记录,应用傅氏变换与最平滤波器串联的方法来消除月均序列的周期波动对确定水位变化趋势的影响,由低通序列一元线性回归分析确定各站水位的变化趋势;结果表明,周期波动对确定海平面变化趋势的影响是显著的.应用经验正交函数(EOF)对网河区的水位变化场进行分解,由相互独立的时间函数和空间特征函数表征网河区区域的水位变化特征;应用时间特征函数计算区域水位的平均变化率为0.02mm/a.根据验潮站的水位变化趋势,探讨网河区水位变化与河床冲淤的关系.  相似文献   

大生活用海水生化处理技术研究进展   总被引：2，自引：0，他引：2  

王静  张雨山 《海洋技术学报》2002,21(4):51-53

采用海水作为大生活用水最结解沿海城市淡水资源紧缺局面的有效途径之一。该技术得以推广应用的技术关键是大生活用海水的后处理技术，文章综述了大生活用海水的生化处理技术的研究现状，并提出了今后的研究方向。  相似文献   

Effect of marine animal excretions on differential growth of phytoplankton species   总被引：2，自引：0，他引：2  

Arzul  Genevieve; Seguel  Miriam; Clement  Alejandro 《ICES Journal of Marine Science》2001,58(2):386-390

  相似文献   

锯缘青蟹胚胎发育过程主要生化组成   总被引：8，自引：0，他引：8  

王桂忠  汤鸿 《台湾海峡》1995,14(3):280-283

锯缘青蟹胚胎３种主要生化组成以蛋白质含量为最高，脂类含量次之，碳水化合物含量最低。胚胎发育的结果导致三种主要生化组成含量降低，其中蛋白质减少了３９．０％，脂类、碳水化合物含量分别减少了１７．０％、７．７％，说明蛋白是青蟹胚胎发育的主要能源物质，这可能与动物适应热带、亚热带的水生环境有关。  相似文献