Xem 1-20 trên 168 kết quả Water protection
  • Hydrology is the science that deals with the processes governing the depletion and replenishment of water resources of the earth's land areas. The purpose of this book is to put together recent developments on hydrology and water resources engineering. First section covers surface water modeling and second section deals with groundwater modeling. The aim of this book is to focus attention on the management of surface water and groundwater resources.

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  • Assessment of source of air, water, and land pollution - Part II : Approaches for consideration in formulating evironmantal control strategies.The environment is a combination of natural factors and social surrounds the outside of a certain system. They affect this system and identify trends and status of its existence. Environment can be seen as a set, in which the system is considered as a subset. Environment of a system is considered to be interactive with that system

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  • As a wetland of international importance located in China, the Poyang Lake Basin's incredible topographical and biological diversity has provided a congregating point for scientists from around the world to engage in cross-disciplinary research. In particular, the International Conference on Poyang Lake Complex Environment System was instrumental in bringing together scholars from China, North America, and Europe to explore the latest innovations in water resource science and watershed management.

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  • Contaminated bottom sediments and their negative impacts on water quality are a major problem in surface waters throughout the United States as well as in many other parts of the world. Even after elimination of the primary contaminant sources, these bottom sediments will be a main source of contaminants for many years to come. In order to determine environmentally-effective and cost-effective remedial actions, the transport and fate of these sediments and associated contaminants must be understood and quantified.

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  • Publication of this book is a milestone for the Water Supply and Sanitation Collaborative Council. It demonstrates the Council's unique capacity to bring together water and sanitation professionals from industrialised and developing countries to formulate practical guidance on a key issue of the day. Industrialised countries have extensive experience of the problems caused by water pollution and the strategies and technologies available to control it.

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  • Of late, the coastal ecosystems are highly degraded due to high population and industrial growth (Glasby & Roonwal, 1995; UNEP, 1997). Due to various pollutions including pesticide poisoning (Sen Gupta et al., 1990), over exploitation of water resources by power plant industries and the municipal uses and encroachment for urban developments force the fishing community to the brink of disappearance. When those natural resources are imperilled, so too are the livelihoods of the many people who live and work there.

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  • Embankment crest and the toe: that is limited to the scope of protection of the embankment on the shore. Roof slope: expressed as the ratio, for example 1:3. Roof more comfortable (less steep), the embankment as a protective effect, but the price will be more expensive (for large embankment surface). Structure and size of the overlay: Overlay roof design must be capable of against the effects of currents, waves, etc. Conventional coatings include removable components assembled together. Gap between them so that water inside to escape, to avoid the effects of water pressure in the soil....

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  • In order to maintain economic development and minimize future regional and international conflicts, the United States will need sustainable supplies of high-quality fresh water. Solutions to local water scarcity issues will likely require a combination of approaches, including demand management, improved water storage capacity, water quality protection, and advancements in supply-enhancing water treatment technologies. Desalination technologies can create new sources of freshwater from otherwise impaired waters such as seawater or brackish water.

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  • Water conservation encompasses the policies, strategies and activities to manage fresh water as a sustainable resource to protect the water environment and to meet current and future human demand. Population, household size and growth and affluence all affect how much water is used. Factors such as climate change will increase pressures on natural water resources especially in manufacturing and agricultural irrigation.

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  • Privacy plans, or a comprehensive set of policies and procedures to manage privacy protection, have been developed in 51.1 percent of the organizations that participated in the 13th annual Information Systems and E-Business Spending study conducted in 2002 by Computer Economics. This is a considerable increase from 2001, when only 33.3 percent of the respondents had developed their privacy plans. Meanwhile, 23.4 percent of organizations have not started developing their privacy plans—almost the exact percentage that had not started in 2001.

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  • Water-resource managers have long strived to meet their goals of system reliability and environmental protection in the face of many uncertainties, including demographic and economic forecasts, intrinsic weather variability, and short-term climate change induced by El Ni

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  • In 1981 the state of Wisconsin initiated a trading program for the point source dischargers-primarily paper mills and sewage treatment plants-along the Fox River. The state initiated the program in an effort to meet water quality standards for biological oxygen-demand pollutants. Under the program, the state (1) established a total waste load goal; (2) imposed more stringent limits on individual dischargers; and (3) under limited conditions, allowed the dischargers...

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  • Stormwater runoff reduces water clarity and lowers the value of lakeside properties. Florida Friendly landscaping helps reduce stormwater from entering the lake by helping it soak into the ground, preventing damage to lake water quality and loss of property value. Examples of improvements HOAs might find they need are: mulching a pathway, planting ground covers, establishing a buffer zone of shrubs and other plants along the shore of their retention pond, diverting stormwater water away from a driveway or building, and pumping the septic system regularly.

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  • I have literally handled hundreds of customer calls which ranged through a wide gamut of difficulties and applications challenges. A great majority of these calls could have been avoided had the end user read just the first section of Mr. Broadwell's book'its appeal will span the gamut between the researcher and designing engineer to the actual day to day operator.

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  • Research over the past decade has demonstrated the feasibility of extracting topographic information of hydrological interest directly from digital elevation models (DEM). Techniques are available for extracting slope properties, catchment areas, drainage divides, channel networks and other data (Jenson and Domingue, 1988; Mark, 1988; Moore et al., 1991; Martz and Garbrecht, 1992). These techniques are faster and provide more precise and reproducible measurements than traditional manual techniques applied to topographic maps (Tribe, 1991)....

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  • (USGS) is to assess the quantity and quality of the natural resources of the Nation and to provide information that will assist resource managers and policymakers at Federal, State, and local levels in making sound decisions. Assessment of water-quality conditions and trends is an important part of this overall mission. One of the greatest challenges faced by waterresources scientists is acquiring reliable information that will guide the use and protection of the Nation’s water resources.

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  • Automatic Water Supply and Drainage Control Ideal for level control of any conductive liquid. Both general-purpose and panel-use models available. Incorporates an arrester for surge and induced lightning protection. Wide range of models: Long-distance, high- and low-sensitivity, two-wire, etc. LED indicator for quick operation check.

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  • Honey bees (Apis mellifera L.) are the main pollinating agents for numerous plants and fruit trees and, hence, play a key role in agriculture and more generally in the maintenance of ecological biodiversity. Although these social insects are not the targets of all the different agrochemical treatments used in crop protection, they are widely affected by pesticides.

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  • The findings, interpretations, and conclusions expressed in this book are entirely those of the authors and should not be attributed in any manner to the World Bank, to its affiliated organizations, or to members of its Board of Executive Directors or the countries they represent. The World Bank does not guarantee the accuracy of the data included in this publication and accepts no responsibility for any consequence of their use.

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  • Marine birds are equally at home on land, in the air, and in the water. While many organisms can go from land to water (amphibians, some reptiles, some insects), others generally live in only one medium during their lives. Marine birds switch from one to the other, often daily. Such flexibility requires unique physiological and morphological adaptations to the environment, a medium that has also exerted selective forces on the behavior, ecology, and demography of these birds.

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