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.

Determination of the number of storm events representing the pollutant mean concentration in urban runoff

Maniquiz-Redillas, Marla C.,Mercado, Jean Margaret R.,Kim, Lee-Hyung Informa UK (Taylor Francis) 2013 Desalination and water treatment Vol.51 No.19

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>

Factors affecting heavy metal removal in urban stormwater runoff

( Marla C. Maniquiz-redillas ),( Ji Yeon Choi ),( Jung Sun Hong ),( Precious Eureka Flores ),( Lee-hyung Kim ) 한국물환경학회(구 한국수질보전학회) 2015 한국물환경학회·대한상하수도학회 공동 춘계학술발표회 Vol.2015 No.-

Selection of cost-effective Green Stormwater Infrastructure (GSI) Applicable in Highly Impervious Urban Catchments

최지연,Marla C. Maniquiz-Redillas,홍정선,Lee-Hyung Kim 대한토목학회 2018 KSCE Journal of Civil Engineering Vol.22 No.1

Urban areas such as roads, and parking lots, present different sets of problem, vehicular Nonpoint source (NPS) loadings derived from vehicular use are very high, while the roof have low NPS pollutant loadings. Therefore, this study was conducted to monitor the actual stormwater runoff characteristics of various landuse types and the treatment efficiency of the constructed GSI systems applied. The data used to calculate the pollutant concentrations were gathered from a total of 172 storm events during the five year monitoring period on a paved road, parking lot and roof landuse site. Based on the results, the road and parking lot landuses have characteristics of large amount of stormwater runoff, high peak flow and runoff of high pollutant concentration due to the vehicular activities. Applicable facilities include pretreatment facilities, such as infiltration trench, subsurface flow (SSF) and hybrid constructed wetland and tree box filter which have SA/CA ratios within 1~2% were appropriate for facilities effective for reducing pollutants including infiltration and filtration functions. Meanwhile, the roof landuse contains low pollutants in comparison to other land uses, so, bioretention, rain garden, and free water surface (FWS) constructed wetland which have SA/CA ratio within 5% were appropriate to enable processing and recycling of large amount of stormwater runoff that have infiltration and retention function. Therefore, costeffective GSI design must not only depend on treated runoff quantity but also quality of the treated runoff for landuse.

비점오염저감을 위한 도로변 적용 수목여과시설의 평가

최지연,Marla C. Maniquiz-Redillas,Franz Kevin F. Geronimo,김이형 한국방재학회 2012 한국방재학회 학술발표대회논문집 Vol.11 No.-

도로는 포장지역으로 불투수율이 높고 차량의 운행으로 인하여 비점오염물질의 축적이 큰 토지이용이다. 도로는 대부분 수계와 연관되어 강우시 처리되지 않은 비점오염물질 및 첨두유량으로 인하여 환경수리학적 문제를 야기하여 수생태계에 악영향을 미친다. 이에 미국, 유럽 및 일본을 비롯한 선진국에서는 각종 수리학적 문제를 해결하기 위하여 환경 친화적인 기술을 개발, 저영향개발 기술 (Low Impact Development) 기술을 적용함으로써 도시내 건전한 물순환 구축 및 수생태 보전을 위한 효율적인 유역관리를 하고 있다. 이러한 기술은 강우유출수의 유출을 지연시켜 개발 이전의 지역이 가지고 있던 수리학적 기능을 최대한 흉내 내는 효율적 유역관리로 도시개발사업 등에 적용되어 지고 있다. 따라서 본 연구에서는 도시지역 물순환 시스템의 왜곡 및 수생태계 복원을 위하여 저류 및 여과 기작이 적용된 도로 LID 기술을 개발하고자 수행되었으며, 현장에 적용된 1.4m×1.4m×2.0m (L×W×H) 규모의 Test-bed를 통하여 수목여과시설에 대한 평가를 실시하였다. 본 연구를 통하여 수목여과시설의 비점오염저감 능력에 대한 평가 결과, 10mm 이하의 소규모 강우에서는 대부분의 비점오염물질 항목에서 유입량 대비 70% 이상의 저감되었고, 10mm 이상의 대규모 강우의 경우 40% 이상의 저감효율을 나타내는 것으로 조사되었다. 또한 물순환 기여도 평가를 통하여 10mm 이하의 소규모 강우가 발생할 시 유입수의 73.7%가 시설 내 저류되었으며 10mm 이상의 큰 강우 발생 시에도 유입수의 30.7%가 저류되어 물순환 기여에 도움이 되는 것으로 나타났다. 따라서 본 연구의 수목여과시설이 도로에 적용시 비점오염물질의 유출 저감에 기여하여 개발과 환경이 공존될 수 있으며 도시내 물 보유를 높여 자연적인 물순환에 기여 할 수 있을 것으로 판단된다.

KOSHAM signs Cooperation Agreement with PAGASA, creates a dialogue with UST on its first visit in the Philippines

Dr. Marla C. Maniquiz-Redillas 한국방재학회 2015 한국방재학회지 Vol.15 No.4

Analysis of water quality improvement efficiency using constructed wetland in a coastal reservoir

Jungsun Hong,Marla C. Maniquiz-Redillas,Jong-Hwa Ham,Lee-Hyung Kim 한국습지학회 2016 한국습지학회지 Vol.18 No.3

담수호 수질오염방지를 위해 유역종합대책과 호내 대책으로 수질오염방지 종합대책 수립 및 인공습지를 적용하였다. 본 연구는 화성호 수질 개선 및 자연생태계 보호를 위한 호소 수변지역 인공습지 조성에 따른 수질정화 효율과 인공습 지 효율 제고를 위한 설계 고려사항을 도출하기 위하여 수행하였다. 연구대상 시설은 경기도 화성시에 위치한 인공습 지 시스템으로forebay와 wetland로 구성되어 있다. 모니터링은 강우시 2회, 건기시 10회 수행하였으며, 분석 결과 인 공습지 유입 및 유출의 유속은 COD와 TN의 부하량과 높은 상관성을 가지는 것으로 분석되었다. 인공습지의 forebay 지점에서 건기시에는 COD, TN 및 TP의 농도가 감소하는 것으로 조사되었으며, 비 강우시에 비해 강우시에 저감효율 이 상대적으로 높은 것으로 나타났다. 또한, 강우시에 인공습지에 유입되는 양에 비해 유출되는 양이 상당히 작은 것으 로 강우유출수 저감 효과에 뛰어난 것으로 분석되었다. 건기시 및 강우시의 인공습지의 전반적인 효율의 경우 TSS는 50% 이상, TP는 20~35%으로 조사되었으며, TN은 26~94%로써 다른 오염물질에 비하여 높은 저감효율을 나타냈다. 이러한 모니터링 자료는 향후 담수호 수질정화효율 증대를 위한 인공습지 설계 시 중요한 자료를 제공할 것으로 판단 된다. Diverse and comprehensive countermeasures were established to prevent water pollution in coastal areas such as constructed wetlands(CW).This study was conducted to assess the water quality improvement through CW constructed along the shoreline of Hwaseong coastal reservoir. The CW is located in Hwaseong-si, Gyeonggi-do and consisted of a forebay and a wetland. The CW was monitored twice during rainy days and 10 times during dry days. The monitoring results indicated that in and out flowrates were highly correlated with COD and TN loads. COD, TN and TP concentrations in the forebay was lower during dry days than rainy days. However, concentration and mass removal efficiencies of COD, TN and TP were greater during rainy days. In addition, the volume flowing into the CW was less compared to the outflow during rainy days indicating that the CW efficiently reduced the runoff volume. The overall pollutant removal efficiency of the CW were at least 50% for TSS, 20 to 35% for TP, and 26 to 94% for TN. The data gathered may be used to improve the pollutant removal efficiency of the system in the future.

Assessment of aeration pond operation in a constructed wetland receiving high nitrogen content wastewater from livestock area

Lee, Soyoung,Maniquiz-Redillas, Marla C.,Kim, Lee-Hyung Desalination Publications 2018 Desalination and Water Treatment Vol.101 No.-

Lifecycle cost assessment of best management practices for diffuse pollution control in Han River Basin

Soyoung Lee,Marla C. Maniquiz-Redillas,Jeong Yong Lee,Hyunsaing Mun,Lee-Hyung Kim 한국습지학회 2016 한국습지학회지 Vol.18 No.4

환경부는 비점오염원 관리를 위해 시범사업으로 12개의 비점오염 저감시설을 경안천 유역에 설치하였으며, 2006년부 터 모니터링이 시작되었다. 본 연구는 비점오염 저감시설의 오염부하량, 저감효율, 유지관리 활동 등의 장기간 수행된 모니터링 결과를 바탕으로 각 시설의 경제성을 평가하기 위해 수행되었으며, 생애주기비용(Lifecycle cost, LCC)을 분 석하였다. 비점오염 저감시설의 유지관리는 시설경관을 향상시키기 위한 심미적 관리가 중점적으로 수행된 것으로 나 타났으며, 저류형 시설(Retention Pond, RP)이 년간 8,483$, 침투형 시설(Infiltration System, IS)이 8,888$로 대부분 비슷한 비용이 발생한 것으로 분석되었다. LCC는 인공습지(Constructed Wetland, CW)가 가장 높은 것($418,324)으 로 나타났으며, 반면에 식생형 시설(Vegetated System, VS)이 가장 낮은 것($210,418)으로 분석되었다. 본 연구에서 조사된 비점오염 저감시설의 LCC와 하수처리장 등 수질처리시설의 LCC를 비교한 결과 비점오염 저감시설이 낮은 것 으로 나타났다. 한편, 처리용량 대비 생애주기비용이 높아질수록 TSS와 TN의 저감효율은 높아지는 것으로 나타났다. 이러한 연구결과는 비용효율적인 비점오염 저감시설을 설계하는데 유용하게 활용될 것으로 기대되며, 향후 LCC 모델 의 기초자료에도 활용될 수 있을 것으로 판단된다. Diffuse pollution management in Korea initiated by the Ministry of Environment (MOE) resulted to the construction of pilot facilities termed Best Management Practices (BMPs). Twelve BMPs installed for the diffuse pollution management in the Kyung-An Stream were monitored since 2006. Data on the mass loading, removal efficiency, maintenance activities, etc. were gathered and utilized to conduct the evaluation of long-term performance of BMPs. The financial data such as actual construction, design and maintenance cost were also collected to evaluate the lifecycle cost (LCC) of BMPs. In this study, most of the maintenance activity was focused in the aesthetic maintenance that resulted to the annual maintenance cost of the four BMP types was closely similar ranging from 8,483 $/yr for retention pond to 8,888 $/yr infiltration system. The highest LCC were observed in constructed wetland ($418,324) while vegetated system had the lowest LCC ($210,418). LCC of BMPs was not so high as compared with the conventional treatment facility and sewage treatment plant. On the other hand, the relationship of removal efficiency on unit cost for TSS and TN was significant. This study will be used to design the cost effective BMP for diffuse pollution management and become models for LCC analysis.