浅谈水土保持监测体系建设

简述了水土保持监测的重要性和必要性,并明确了水土保持监测体系建设中的有关监测内容,方法,任务。     

电力行业标准DL/T5178-2003《混凝土坝安全监测技术规范》修订介绍

本文叙述了电力行业标准DL/T5178-2003《混凝土坝安全监测技术规范》修订过程、修订原则及修订的主要内容。     

电力监控微机综合自动化系统在响革水电站的应用

本文从系统结构、软/硬件功能等方面对电力监控微机综合自动化系统在响革电站的应用作了详细论述,并通过与常规电站的比较,阐述了电力监控微机综合自动化系统重要的现实意义和作用。     

磁浮子水位仪在漳泽水库大坝安全监测中的应用

本文介绍了磁浮子水位仪自动测量系统在漳泽水库大坝的应用情况，通过与人工观测数据对比分析，说明该系统传感器所测数据准确可靠。     

飞来峡水利枢纽大坝安全监测自动化系统及其升级完善设想

介绍飞来峡水利枢纽大坝安全监测自动化系统的组成情况,并根据运行以来所面临的新问题加以总结,提出认为必要和可行的升级完善设想。     

Optimal Dynamic Monitoring Network Design and Identification of Unknown Groundwater Pollution Sources

The identification of unknown pollution sources is a prerequisite for designing of a remediation strategy. In most of the real world situations, it is difficult to identify the pollution sources without a scientifically designed efficient monitoring network. The locations of the contaminant concentration measurement sites would determine the efficiency of the unknown source identification process to a large extent. Therefore coupled and iterative sequential source identification and dynamic monitoring network design framework is developed. The coupled approach provides a framework for necessary sequential exchange of information between monitoring network and source identification methodology. The preliminary identification of unknown sources, based on limited concentration data from existing arbitrarily located wells provides the initial rough estimate of the source fluxes. These identified source fluxes are then utilized for designing an optimal monitoring network for the first stage. Both the monitoring network and source identification process is repeated by sequential identification of sources and design of monitoring network which provides the feedback information. In the optimal source identification model, the Jacobian matrix which is the determinant for the search direction in the nonlinear optimization model links the groundwater flow-transport simulator and the optimization method. For the optimal monitoring network design, the integer programming based optimal design model requires as input, simulated sets of concentration data. In the proposed methodology, the concentration measurement data from the designed and implemented monitoring network are used as feedback information for sequential identification of unknown pollution sources. The potential applicability of the developed methodology is demonstrated for an illustrative study area.     

谈隧道施工的监控量测管理体系

目前,我国正在大量兴建的山岭隧道工程都是按设计和规范要求进行监控量测的,但也存在观测不足、反馈不及时的问题,结果部分隧道发生塌方事故．鉴于目前隧道施工安全的严峻形势,加大对隧道施工监控量测的监管力度,建立和健全监控量测管理体系,加强隧道施工监控量测的监理．     

水电厂计算机监控技术的辉煌20年

我国水电行业科技人员经过２０多年长期艰苦奋斗，求实创新，终于在水电厂计算机监控技术领域取是了光辉业绩，以国家电力公司电力自动化研究院为代表的计算机监控产品不仅能满足国内市场的需要，而且能在国际招标中中标，并出口国外，为我国争得了荣誉，节省了大量外汇。     

Diets,population structure,and seasonal activity patterns of mudpuppies (Necturus maculosus) in an urban,Great Lakes coastal habitat

Freshwater species native to the Laurentian Great Lakes region face numerous environmental stressors, and the conservation status and ecological relationships of many remain poorly understood. One such species, the mudpuppy (Necturus maculosus), is declining, but better information on their natural history and development of more effective population monitoring techniques is needed. We assessed seasonal variation in capture success, biases in capture techniques, and feeding ecology of mudpuppies in Wolf Lake, a highly perturbed and urban former estuarine wetland complex to Lake Michigan. Trapping periods of ≥ 3 consecutive nights occurred from January to May 2015, and October 2015 to March 2016. Overall trapping success differed among trapping periods (p = 0.01) and declined precipitously at water temperatures above 14.1 °C (p < 0.001). Mudpuppies in traps (mean 26.9 ± 0.5 cm) were larger than those caught with hand nets (mean 14.7 ± 0.8 cm, p < 0.0001), suggesting that multiple methods may be needed to accurately assess demographics. Stomach contents obtained through gastric lavage included mollusks, leeches, insects, isopods, amphipods, crayfish, fish, a frog, and a juvenile conspecific. Invasive species, including rusty crayfish (Orconectes rusticus), round gobies (Neogobius melanostomus), and zebra/quagga mussels (Dreissena spp.) were present in guts, suggesting mudpuppy foraging has changed along with aquatic communities in the region. Prey community analyses revealed differences in overall diet among size classes of mudpuppies (p = 0.001), but relatively weak similarity within size classes. Results suggest that mudpuppies in lake ecosystems occupy a broad niche that changes as they grow.     

Environmental regulatory enforcement with “green” consumers

We consider a standard probabilistic model of random monitoring to analyze the interactions between a firm and a monitoring agency in the presence of “green” consumers when compliance payoffs are contingent on monitoring and monitoring costs are shared by the monitoring agency and the firm. When the amount paid by the firms if monitored is exogenously fixed, we find that full compliance is implemented with a finite fine. If there is an upper bound for the fine and the regulator determines endogenously the fine and the amount paid by the firms if monitored, we find that full compliance is also achieved, although the optimal fine is now set at its maximum level. The optimal amount paid by the firms if monitored is lower than the environmental premium the compliant firm gets.The author thanks two anonymous referees for their useful comments and suggestions