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Marla C. Maniquiz,Ji Yeon Choi,So Young Lee,Hye Jin Cho,Lee Hyung Kim 대한환경공학회 2010 Environmental Engineering Research Vol.15 No.4
This study attempted to develop and suggest a more appropriate method for the determination of event mean concentration (EMC) and pollutant removal efficiency of a stormwater best management practice (BMP) considering rainfall. The stormwater runoff and hydrologic data gathered from 22 storm events during a 28-month monitoring period on a swirl and filtration type of BMP were used to evaluate the developed methods. Based on the findings, the modified EMC method resulted in lower (average) values than the overall EMC, although the differences were not significant (P>0.05). By comparison, the developed ``Rainfall Occurrence Ratio`` (ROR) method was most significantly correlated (r=0.967 to 988, P<0.009) with the other existing removal efficiency determination methods such as the ``Efficiency Ratio`` (ER), ``Summation of Loads`` (SOL) and ``Regression of Loads`` (ROL) methods. In addition, the ROR method gave the highest efficiency values, with no significant differences with any of the pollutant parameters, unlike the other three methods. These results were obtained because the ROR method integrated both pollutant loading and rainfall, which are not considered by the other three methods. Therefore, this study proved the suitability of the modified EMC and ROR methods for application in other BMP monitoring studies.
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.
Unit soil loss rate from various construction sites during a storm
Maniquiz, Marla C.,Lee, Soyoung,Lee, Eunju,Kong, Dong-Soo,Kim, Lee-Hyung IWA Publishing 2009 Water Science & Technology Vol.59 No.11
<P>The Korean Ministry of Environment (MOE) opts to establish an ordinance having a standard specifying an allowable soil loss rate applicable to construction projects. The predicted amount of soil loss from a construction site exceeding the standard can be used to calculate the percent reduction necessary to comply with the ordinance. This research was conducted to provide a basis to establish a standard by investigating the unit soil loss rates in the three phases of development: pre-construction, active construction and post construction based from 1,036 Environmental Impact Assessment (EIA) reports within the six-year period (2000-2005). Based on the findings, several factors affect the magnitude of soil loss rates particularly storm characteristics, site slope, soil type, location from rivers, as well as the type of construction activity. In general, the unit soil loss rates during the active construction phase are extremely higher in comparison to undisturbed areas; in magnitude of 7 to 80 times larger in urban areas and 18 to 585 times in rural areas. Only between 20 to 40 percent of the soil loss rates was contributed at pre- and post- construction phases indicating that the active construction phase is the most important phase to control.</P>