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Newsletter Issue: May 25, 2005 |
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Environ + . We publish solid ideas backed by theory and experience
- Passive permanganate remediation of a
solvent DNAPL source zone
- Aquifer artificial recharge: A method for
an efficient management of water resources in arid zones
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- Economic instruments for the control of water
pollution: Conditions and application cases
- A Current Overview of Permeable Reactive
Barrier Technology
- Distribution of arsenic pollution in the South
West basin groundwater of the Valle Sebaco-Matagalpa, Nicaragua
- Implications of the European Frame Water
Directive (200/60/CE) in the management of groundwater
- Sustainable management of water resources:
Development of capabilities and social participation in the
Lerma-Chapala basin, Mexico
- Joint management of water resources:
Experiences in Spain
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Aberdeen, Gran Bretana, 22-27 Mayo 2005
2005
World Renewable Energy Congress
Santiago, Chile, 25-28 de Mayo, 2005
AGUA
& AMBIENTE 2005
Toronto, Canada, Mayo 25-27, 2005
EECO
2005
Vancouver, Canada, 1-3 Junio, 2005
Global
Forest and Paper Summit 2005
Sapporo, Japan 6-8 Junio 2005
3rd
IWA leading-edge conference & exhibition on water and wastewater
treatment technologies
Milan, Italia, 28-30 Junio 2005
POWER-GEN
Europe
Permanent Internet Course
Building
Models in Ecology and Natural Resources Management
Catedra UNESCO of Sustainable Development, at Universidad Politecnica
de Catalunya offers a 20 hours course, with an UPC Official Diploma.
This ocurse has applications in environmental impact studies, natural
resources management and regional planification projects. At the end of
the course the student is able to create models with the dynamic
simulation software Vensim, Stella, Powersim, ithink, Dynamo and
similar ones, applying the System Dynamics Theory.
More
info
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June 7, 2005 - Internet Course
Triad
Approach - A New Paradigm for Environmental Project Management
June 14, 2005 - Internet Course
Mitigation
Wetlands - Guidance for Characterization, Design Construction, and
Monitoring of Mitigation Wetlands
Port of Entry whishes to thank the Central American Water Resources
Management Network -CARA (www.caragua.org) its participation in Environ +
May 2005 Issue, Port of Entry's environmental newsletter. CARA
contributed five works presented to the Congreso CARA, carried out on
March 2005 in Managua, Nicaragua.
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Passive
permanganate remediation of a solvent DNAPL source zone
Permanganate remediation was conducted in southern Florida at a small
industrial site with TCE and 1,1,1-TCA contamination down to 70 ft bgs
in a sand aquifer. The permanganate solution was injected into the
DNAPL source zone where a small mass of residual TCE DNAPL caused this
zone to have TCE concentrations exceeding 10,000 ug/L, with small zones
approaching TCE saturation. The KMnO4 injections successfully destroyed
essentially all of the DNAPL present in the source zone with no
apparent displacement of contaminant mass to zones outside the
treatment zone. Following KMnO4 treatment, natural attenuation
processes quickly reduced concentrations in the plume to below MCLs for
both TCE and TCA. Furthermore, natural attenuation processes have
strongly reduced both TCE and TCA concentrations within the treatment
zone since KMnO4 treatment ceased and the rate of natural attenuation
suggests that MCLs will be achieved in 2005.
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Managed groundwater recharge: A powerful tool for efficient management of water resources in arid regions
The Phoenix metropolitan area, a group of more than twenty municipalities, is the fastest growing population center and the sixth largest urban area in the United States. Located in a semiarid region of North America, it has very limited surface water resources. Surface water comes from the Salt River and its tributaries as runoff from snow accumulated during the winter in distant mountains to the north during wet climatological cycles. In 1980 a strict groundwater code was adopted for the state and areas of closely regulated groundwater abstraction were established. Increased water conservation was mandated from the municipal and industrial water users and better management practices were required in agriculture. Artificial groundwater recharge and water reuse were promoted and extensively adopted. The coordinated use of all these water management techniques will continue to provide the necessary resources to support the population growth.
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Economic
instruments for the control of water pollution: Conditions and
application cases
One of the major conflicts generated by territory occupation, massive
natural resources exploitation, and industrialization in Latin America
and the Caribbean at the end of XX century has been the arising of
pollution affecting water bodies and water courses. In spite of the
gravity of the pollution of water resources, historically, the
countries in the region have not given an effective attention to
protecting water quality. There has been more advancement in the
declarative and normative levels than in practice.
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A
Current Overview of Permeable Reactive Barrier Technology
Permeable reactive barriers have been successfully implemented
worldwide as a groundwater remediation technology. The technology is
particularly attractive because of the high rates of degradation, the
granular iron is relatively inexpensive, the process requires no
external energy supply and because most compounds are degraded with
production of few, if any, hazardous (chlorinated) organic by-products.
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Distribution
of arsenic pollution in the South West basin groundwater of the Valle
Sebaco-Matagalpa, Nicaragua
One of the environmental problem of interest in Nicaragua is the
natural concentration of arsenic in groundwater as is found in the
North and South West regions of Nicaragua. These areas are close to
mineralized areas and along the most important active tectonic
structure, the Nicaragua graben. High concentration of arsenic has been
detected in water for human consumption in the South West basin
groundwater of the Valle de Sebaco-Matagalpa. This article presents the
results of a study on the distribution of arsenic pollution in this
area.
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Implications
of the European Frame Water Directive (200/60/CE) in the management of
groundwater
The new European Frame Water Directive (2000/60/CE) indicates that is
necessary to include water resources protection and sustainability
criteria in the groundwater management, characterization and
remediation projects. The cases presented in this article show the
usefulness of: remediation methods in situ to increase the water
resources available, numerical flow models as tools for planning and
management, reactive transportation and geochemical models for planning
the decontamination of aquifers and Geographic Information Systems as
tools to support the management of massive amount of data.
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Joint
management of water resources: Experiences in Spain
The joint management of surface water and groundwater resources is a
fundamental concept underlying the Spanish Water Act and the European
Union’s new policy concerning water use. However, the practical
application of this concept is not the same in all EU countries, as the
coordinated utilization of various water sources to meet a single
demand is not common practice in the north of Europe, where water is
relatively abundant, while in some southern countries, including Spain,
the gradual introduction of this management technique is being
considered. Specifically, in Spain a nationwide study programme has
been designed and put in place to examine the coordinated utilization
of surface water, groundwater and non-conventional sources of water,
found in 27 water exploitation systems. This paper presents an analysis
and description of studies carried out in five of these systems.
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