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Understanding the factors influencing the removal of heavy metals in urban stormwater runoff
Maniquiz-Redillas, Marla C.,Kim, Lee-Hyung IWA Publishing 2016 Water Science & Technology Vol.73 No.12
<P>In this research, an infiltration trench equipped with an extensive pretreatment and filter bed consisting of woodchip, sand and gravel was utilized as a low impact development technique to manage stormwater runoff from a highly impervious road with particular emphasis on heavy metal removal. Findings revealed that the major factors influencing the removal of heavy metals were the concentration of the particulate matters and heavy metals in runoff, runoff volume and flow rates. The reduction of heavy metals was enhanced by sedimentation of particulates through pretreatment. Fine particles (<2 mm) had the most significant amount of heavy metals, thus, enhanced adsorption and filtration using various filter media were important design considerations. Sediment was most highly attached on the surface area of woodchip than to other filter media like sand, gravel and geotextile. It is suggested that maintenance must be performed after the end of the winter season wherein high sediment rate was observed to maintain the efficiency of the treatment system.</P>
Disasters in The Philippines: Occurrence, Effects, and Risk Reduction and Management Plan
Marla C. Maniquiz-Redillas 한국방재학회 2015 한국방재학회 학술발표대회논문집 Vol.14 No.-
In this presentation, a review on the major disasters that occurred in the Philippines over the recent years will be concisely presented. This include the overview of the type of disasters that occurred, the frequency of occurrence, as well as the effects of these disasters on communities (e.g., economic costs to agriculture and infrastructure, etc.). Also, the legal basis for policies, plans and programs to deal with the disasters will be presented. It will be covered under the four thematic areas, namely, (1) Disaster Prevention and Mitigation; (2) Disaster Preparedness; (3) Disaster Response; and (4) Disaster Rehabilitation and Recovery, which correspond to the structure of the National Disaster Risk Reduction and Management Council(NDRRMC). By law, the Office of Civil Defense formulates and implements the NDRRMP and ensures that the physical framework, social, economic and environmental plans of communities, cities, municipalities and provinces are consistent with such plan. The National Disaster Risk Reduction and Management Plan (NDRRMP) is consistent with the National Disaster Risk Reduction and Management Framework (NDRRMF), which serves as “the principal guide to disaster risk reduction and management (DRRM) efforts to the country….” The Framework envisions a country of “safer, adaptive and disaster-resilient Filipino communities toward sustainable development.” It conveys a paradigm shift from reactive to proactive DRRM wherein men and women have increased their awareness and understanding of disaster reduction risk management (DRRM), with the end in view of increasing people’s resilience and decreasing their vulnerabilities. The National Disaster Risk Reduction and Management Plan (NDRRMP) 2011-2028 will also be discussed. The NDRRMP sets down the expected outcomes, outputs, key activities, indicators, lead agencies, implementing partners and timelines under each of the four distinct yet mutually reinforcing thematic areas. The goals of each thematic area lead to the attainment of the country’s overall DRRM vision, as graphically shown below.