Field measurements and monitoring of wastewater discharge in sea water     

Michele Mossa   《Estuarine, Coastal and Shelf Science》2006,68(3-4):509

This paper reports a study of the field measurements and monitoring of wastewater discharge in sea water at Bari East (Italy). A wastewater sea outfall system is an integral and fundamental part of each wastewater treatment with ultimate sink in the sea water. The design of a water treatment plant and wastewater outfall must take into account the use of the environmental water, the values of physicochemical parameters to be respected in order to safeguard the use itself and the quality of the environmental water where wastewater is issued. In the present study measurements of sea current velocity components were carried out with a VM-ADP (Vessel-Mounted Acoustic Doppler Profiler). Salinity, wind directions and velocities were assessed with, for one survey, the total faecal coliforms and other biochemical parameters. It was emphasized that the measurements necessary for monitoring cannot be concentrated in the wastewater outfall pipe zone only, but should be extended to a neighbouring area of the outfall pipe, with an extension depending on the wastewater discharge, the polluting charge and the magnitude of the sea currents and the winds typical of the zone of interest. The analyses presented in this paper confirm that the sea zones close to the wastewater outfall pipe are particularly sensitive and vulnerable. Such results must be considered in the planning of a wastewater outfall pipe.  相似文献   

Cross-Calibration and Long-Term Monitoring of the Microwave Radiometers of ERS, TOPEX, GFO, Jason, and Envisat     

R. Scharroo  J. L. Lillibridge  W. H. F. Smith  E. J. O. Schrama 《Marine Geodesy》2004,27(1):279-297

The radiometers on board the satellites ERS-1, TOPEX/Poseidon, ERS-2, GFO, Jason-1, and Envisat measure brightness temperatures at two or three different frequencies to determine the total columnal water vapor content and wet tropospheric path delay, a major correction to the altimeter range measurements. In order to asses the long-term stability of the path delay, the radiometers are calibrated against vicarious cold and hot references, against each other, and against several atmospheric models. Four of these radiometers exhibit significant drifts in at least one of the channels, resulting in yet unmodeled errors in path delay of up to 1 mm/year, thus limiting the accuracy at which global sea level rise can be inferred from the altimeter range measurements.  相似文献   

无机碳与雨生红球藻(Haematococcus pluvialis)细胞调节物质   总被引：4，自引：0，他引：4  

刘建国  孙艳妮  殷明焱  刘伟  张展 《海洋与湖沼》2004,35(5):459-466

以单细胞雨生红球藻为材料，采用酸碱滴定和CO2加富通气培养微藻的方法，对旧液中HCO3^-和CO3^2-浓度变化以及对红球藻细胞生长的影响进行了研究。结果表明，旧液具有限制红球藻细胞生长和诱导细胞转化的作用。同时，旧液中无机碳离子浓度明显高于新液。培养液中富含CO3^2-时，各细胞数量与CO3^2-浓度呈正相关，相关系数为0．88。溶液中仅有HCO3^-时，各细胞数与HCO3^-浓度也呈正相关性。因此，排除了CO3^2-和HCO3^-作为旧液中的调节物质，限制红球藻细胞生长和诱导细胞转化的可能性。旧液乙酸乙酯提取物生物检测实验表明，在粗提取物中有降低细胞增长和诱导细胞转化的活性，表明调节物质能溶于有机相，也反过来证实无机碳离子不是旧液中的调节物质。DNA含量和倍性分析结果表明，红球藻游动细胞DNA复制可以加倍后不经过原生质分裂就可以再次进行，因此推测旧液中的调节物质对原生质分裂过程产生抑制作用，而不对DNA复制过程产生抑制作用。  相似文献   

动态基准实时测量系统的开发与应用   总被引：3，自引：0，他引：3  

卫建东  徐忠阳  张良琚 《海洋测绘》2005,25(1):31-35

介绍了动态基准实时测量系统的硬件组成、站点上全站仪棱镜组合安装与检测方法、系统软件的开发及特点，最后对系统在广州地铁某地铁站结构变形自动监测中的应用情况进行了阐述。通过实际应用表明该系统能应用在自动化、高精度的变形监测领域。  相似文献   

南沙群岛海域水体漫衰减系数Kd(490)的特性研究   总被引：6，自引：1，他引：6  

张清凌  陈楚群  施平 《热带海洋学报》2003,22(1):9-16

对南沙群岛海区水体Kd(490）的特性进行了深入分析和探讨,研究结果表明：Kd（490）的垂直分布与同步测量的海水叶绿素a浓度的垂直分布有很强的相关性;Kd（490）的垂直分布反映出该区域海水存在较强的分层现象,研究中还发现上行辐亮度漫衰减系数KL（490）与Kd（490）垂直变化趋势相当一致,但是以二者达到最大值的深度为界,上层水体的KL（490）值稍大于Kd(490）值,在这一深度以下则相反。  相似文献   

江苏省主要湖泊的降水量与湖泊的降水效应   总被引：10，自引：0，他引：10  

陆鸿宾 《海洋湖沼通报》1991,(2):23-30

本文分析了江苏境内主要湖泊的降水量特征,揭示了长江是江苏各湖泊不同降水量特征的一条十分明显的天然界线;估算了太湖的降水效应,并据此推估出江苏主要湖泊的降水效应不太明显;江苏各湖泊的降水量与其水位年过程趋势相似,只是后者位相滞后于前者而已。  相似文献   

江苏岸外辐射沙脊群东沙稳定性研究   总被引：8，自引：0，他引：8  

陈君  王义刚  张忍顺  林祥 《海洋工程》2007,25(1):105-113

东沙是江苏岸外辐射沙脊群中的第二大沙洲,具有独特的地形地貌和水动力条件,对它进行稳定性研究为揭示整个辐射沙洲及其邻近岸滩的动态演变都非常有益。通过利用多年遥感卫片资料、1998年取得的现场水文泥沙观测资料和东沙滩面表层沉积物资料等,对东沙的地形地貌特征、沉积特征和东沙两侧潮汐通道的水流泥沙特征等进行了详细分析。研究结果表明,东沙的沙脊偏于西侧,西侧滩面较窄、高程较高且岸线较为顺直,东侧滩面较宽、高程较低且岸线较为破碎;西洋和陈家坞槽均处于冲刷状态,净输沙的主要方向为输向槽外或输向条子泥;东沙近三十年来面积有所缩小且有外围向中央收缩的趋势,尤其以向东、向南方向的迁移最为明显。  相似文献   

Experimental investigation on a two-part underwater towed system     

Jiaming Wu  Allen T. Chwang 《Ocean Engineering》2001,28(6)

An experimental set-up is developed and proved to be effective for laboratory study of an underwater towed system. The experimental technique gives a practical method for monitoring the kinematic and dynamic performance of an underwater towed system in a ship towing tank. Both the theoretical and experimental results in the investigation indicate that the hydrodynamic response of a towed vehicle to the wave induced motion of a towing ship can be significantly reduced by applying a two-part tow method. A comparison of the numerical and experimental results in the investigation demonstrates that the numerical simulation results are close to the experimental data, overall agreement between experimental and theoretical results is satisfactory. The results qualitatively verify the mathematical model of a two-part underwater towed system proposed by Wu and Chwang [Wu, J., Chwang, A.T., 2000. A hydrodynamic model of a two-part underwater towed system. Ocean Engineering 27 (5), 455–472].  相似文献   

断阶型潜山带地质模型的建立及储层预测--以CG20潜山为例     

姜素华  王永诗  张家震  王军 《中国海洋大学学报(自然科学版)》2004,34(3):437-445

以 CG2 0潜山为例 ,从建立地质模型入手 ,包括地层模型、构造模型、储集模型、储盖组合模型、速度模型等 ,认识到各套地层分布和储层物性的差异均与地震响应密切相关 ,因此可以利用地震波的信息 ,预测潜山储层的发育及分布情况。在对 CG2 0潜山进行精细全三维构造解释的基础上 ,探讨性地应用了测井约束反演、吸收系数、相干分析及三维模式识别等技术 ,对潜山储层进行了预测 ,从而提高了潜山勘探的效益 ,并为类似断阶型潜山带的勘探提供了成功的经验 ,具有一定的指导意义。  相似文献   

GPS数据采集技术及其在海洋调查中的应用   总被引：1，自引：0，他引：1  

邱雨生  陈敏  刘广山 《台湾海峡》2003,22(3):354-359

本文应用VB6．0开发了智能化的GPS数据采集软件．对该软件的功能进行了简单的介绍，同时对一些关键技术作了较详细的描述。利用该软件、GPS接收机及PC机的组合，可对走航式测量仪器(或移动设备)进行实时定位并保存定位记录，且大大减少一些不必要的数据，使得软件更为实用。  相似文献