유재정 Jae Jeong Yu , 신석호 Suk Ho Shin , 윤영삼 Young Sam Yoon , 송재기 Jae Kee Song

DOI: Vol.26(No.6) 895-902, 2010

The effect of seasonality on water quality variation is very significant. Generally, it reduce the power of the trend extraction. A parametric time-series model was used for detecting trends in historic constituent concentration data. The effect of seasonality is able to remove from time series decomposition technique. According to such statistic methode, long-term water quality trend analysis system (NTrend 1.0) was developed by Nakdong River Water Environmental Research Center. The trend analysis of BOD variation was conducted with NTrend 1.0 at Goreong and Moolkum site in Nakdong river to show the effect of water quality management action plan. Power test of trend extraction was tried each case of `deseasonalized and deannulized` data and `deseasonalized` data. Analysis period was from 1989 to 2006, and it`s period was divided again three times, 1989~1993, 1994~1999 and 2000~2006 according to action plan period. The BOD trend was downward in Goreong site during three times and it`s trend slope was very steep, and upward in Moolkum during 1989~1993, but it was turned downward during 1994~1999 and 2000~2006. It was revealed that it`s very effective to reduce the concentration of BOD by water quality management action plan in that watershed. The result of power test was shown that it is high for trend extraction power in case of `deseasonalized` data.

Longterm trend analysis, Ntrend, Statistical evaluation, Time series decomposition, Water quality

황하선 Ha Sun Hwang , 윤춘경 Chun Gyeong Yoon , 김지태 Ji Tae Kim

DOI: Vol.26(No.6) 903-909, 2010

The purpose of this study was evaluated on the applicability of Load Duration Curve Method (LDC Method) using HSPF watershed model and sampling data for efficient TMDLs in Korea. The LDC Method was used for assessment pollutant characteristics in watershed and water quality variation in each water flow level. Load Duration Curve is applied for judge the level of impaired water-body and can be estimated the impaired level by pollutant, such as BOD, I-N, and T-P in this study depending on variation of stream flow. As a result, BOD, T-P was usually exceed the standard value at low flow and dry hydrologic period. Improvement of effluent concentration from WWTP and riparian buffer protection zone are effective to improve the water quality. T-N showed the worst condition at mid-range hydrologic period and moist hydrologic period. Therefore, soil erosion control program and BMPs for non-point source pollution control is effective for recovery the water quality, which can be useful method for management of water quality in the plan of recovery water quality spontaneously. Applicability of LDC Method was evaluated in the Nakbon A watershed. However, we need to consider more detailed and accumulated data set such as accurate G1S data and detail pollution data, and WWTP discharge water quality data for accurate evaluation of watershed. Overall, The LDC Method is adequate for evaluation of watersheds characteristics, and its application is recommended for watershed management and TMDL Implementation.

Flow Duration Curve, HSPF, Load Duration Curve, TMDL

류지철 Ji Chul Ryu , 강현우 Hyun Woo Kang , 김남원 Nam Won Kim , 장원석 Won Seok Jang , 이지원 Ji Won Lee , 문종필 Jong Pil Moon , 이규승 Kyu Seung Lee , 임경재 Kyoung Jae Lim

DOI: Vol.26(No.6) 910-918, 2010

In recent years, riparian buffer system has been known as one of the effective best management practices. However, establishment of riparian buffer system in aspect of plant species and its position in the riparian buffer zone has not been investigated due to lack of efficient evaluation method for the analysis of water quality improvement with established riparian buffer system. To solve this problem, the SWAT-REMM prototype was developed by the researchers in Canada. But, SWAT-REMM model can not consider the NO(3)-N load into riparian buffer system through subsurface flow. Thus to solved this problem, Fortran code of SWAT-REMM model was modified. This modified SWAT-REMM system was applied to the Bonggok watershed. Three riparian buffer scenarios, 15 m, 10 m, 5 m width for tree and grass, were made to evaluate the effects of riparian buffer system on water quality improvement. Reduction efficiency of T-N by riparian buffer system of 15 m wide was the greatest (6~37%, depending on subwatershed characteristics) among 3 scenarios. It indicates that the reduction efficiency of T-N load has increasing-tendency, as buffer width increasing. The results obtained from the analysis showed that wide buffer zones are found to be more effective in reducing non-point pollutant than narrow buffer zones in the riparian buffer zone system. Hence, the SWAT-REMM model could be efficiently used for evaluation and design the most effective riparian buffer systems to reduce pollutant loads to the watershed although many limitations still exist in SWAT-REMM model.

BMPs, NPS. Riparian buffer system, SWAT-REMM, Total nitrogen

김성준 Sung Joon Kim , 전용태 Yong Tae Jeon , 원찬희 Chan Hee Won

DOI: Vol.26(No.6) 919-925, 2010

The features of precipitating reaction of fluoride have been examined by employing waste gypsum as a precipitant. The major component of waste gypsum was examined to be CaO with minor components of SO3, SiO2. In the experimental condition, the precipitating reaction of fluoride progressed rapidly within a few minutes after the reaction started and reached its equilibrium in 10 minutes. Kinetic analysis showed that the precipitating reaction of fluoride generally followed a first Oder and second Oder with decreasing rate constant with the initial dosage of precipitant. XRD analysis showed that the crystalline structure of precipitate was mainly CaF(2) with partly Ca(5)(PO(4))(3)((OH).

Fluoride, Lime, Precipitation, Waste gypsum, XRD analysis

임종권 Jong Kwon Im , 손현석 Hyun Seok Son , 김성근 Sung Keun Kim , 조경덕 Kyung Duk Zoh

DOI: Vol.26(No.6) 926-933, 2010

Runoff from a parking lot can be highly contaminated nonpoint source due to the impermeability of rainwater. This study presented runoff characteristics of heavy metals especially Zn and Pb from a parking lot during total 17 rain events. Monitoring results showed the first flush phenomenon within 30 min was observed in all rain events, but the event mean concentration (EMC) did not clearly show the characteristics of runoff. The ranges of Pb and Zn was 4~20l μg/L and l3l~672 μg/L, respectively, and the runoff mass of Zn and Pb was highly to related with the flow rate, and runoff coefficient of rain. The runoff mass of Zn was greater than that of Pb in all events. The runoff mass of Pb was highly correlated with the amount of TSS, and TSS and DOC were was related with the mass of Zn. This result implies that Pb and Zn are mainly existed in the particulate form. The results can be used to as meaningful data in the management of nonpoint source, and in the management in the runoff catchment in the parking lot.

Event mean concentration, First flush, Nonpoint source, Runoff, Pb, Zn

전대영 Dae Young Jeon , 이소림 So Lim Lee , 손정원 Jung Won Son , 차영욱 Young Uk Cha , 권기원 Ki Won Kwon , 유평종 Pyung Jong Yoo

DOI: Vol.26(No.6) 934-942, 2010

Bentic macroinvertebrate and fish fauna were investigated from September 2008 to October 2009 in the middle reach of the Suyoung river in Busan. During the survey period benthic macroinvertebrates were collected total 35 species at the three sites (Hanmul-gyo, Dongcheon-gyo, Seokdae Jct.) of Suyoung river. At that sites, species diversity index was 1.9, 1.5, 1.6, dominance index was 0.75, 0.81, 0.86 and Korean Saprobic Index (KSI) was 1.8(B), 4.4(D), 4.4(D) on average, respectively. Dominant species was Caenis Kua, Chironomidae sp., at Hanmul-gyo site and Limnodrilus gotoi, Chironomidae sp., at Dongcheon-gyo and Seokdae Jct. sites. Fish fauna was also investigated at the two sites (Hanmul-gyo and Seokdae Jct.) of Suyoung river. Total caught fishes were 10 species 32 individuals in the first survey and 6 species 26 individuals in the second survey. Dominant species was Carassius auratus in the both surveys. Index of Biological Integrity (IBI) value was C grade at the Hanmul-gyo and D grade at the Seokdae Jct.

Benthic macroinvertebrates, Fish fauna, Index of Biological Integrity, IBI, Korean Saprobic Index, KSI

최동호 Dong Ho Choi , 정재운 Jae Woon Jung , 윤광식 Kwang Sik Yoon , 진소현 So Hyun Jin , 최우영 Woo Young Choi , 최우정 Woo Jung Choi , 김상돈 Sang Don Kim , 임병진 Byung Jin Yim , 최유진 Yu Jin Choi

DOI: Vol.26(No.6) 943-947, 2010

Runoff ratio of paddy fields for the application of Event Mean Concentration (EMC) method was studied. To measure actual runoff ratio of paddy fields, a field monitoring was conducted for 2008 ~ 2009 period. Long-term rainfall data of four cities in major river basins were analyzed and weighting factors were developed to consider temporal and spatial variation of rainfall distribution of Korean peninsula. The observed runoff ratio ranged 0.00 ~ 1.20 and arithmetic mean were 0.25, respectively. However, the representative runoff ratio for paddy fields was determined as 0.41 according to the method suggested by National Institute of Environmental Research (NI ER).

EMC, Paddy field, Representative runoff, Runoff ratio, Weighting factors

강성욱 Sung Wook Kang , 서재환 Jae Hwan Seo , 이병천 Byoung Cheun Lee , 김수진 Sue Jin Kim , 정진호 Jin Ho Jung

DOI: Vol.26(No.6) 948-953, 2010

In ibis study, degradation of estrone (E1) and l7α-ethynylestradiol (EE2) by gamma-irradiation and subsequent reduction of estrogenic activity as a function of absorbed dose were conducted using the yeast two-hybrid assay. Relative potency of E1 and EE2 compared to estrogenic activity of l7β-estradiol (E2) was found to be 0.0144 and 0.1605, respectively. More than 90% of E1 and EE2 (both 5.0 x 10(-6) M) was removed at an absorbed dose of 5 kGy, but more than 40% of estrogenic activity still remained. The addition of TiO2 catalyst appeared to improve the removal efficiency of E1 and decrease estrogenic activity while there was no significant effect for EE2. Additionally, the calculated estrogenic activity of E1 and EE2 based on a regression model was well correlated with the observed activity.

Endocrine disrupting chemicals, Estrogenic activity, Radiation treatment, Yeast two-hybrid assay

박정안 Jeong Ann Park , 김성배 Song Bae Kim , 김민선 Min Sun Kim , 권구흥 Ku Hung Kwon , 최낙철 Nag Choul Choi

DOI: Vol.26(No.6) 954-962, 2010

The objective of this study was to develop automatic event detection algorithm for groundwater level rise. The groundwater level data and rainfall data in July and August at 37 locations nationwide were analyzed to develop the algorithm for groundwater level rise due to rainfall. In addition, the algorithm for groundwater level rise by ice melting and ground freezing was developed through the analysis of groundwater level data in January. The algorithm for groundwater level rise by rainfall was composed of three parts, including correlation between previous rainfall and groundwater level, simple linear regression analysis between previous rainfall and groundwater level, and diagnosis of groundwater level rise due to new rainfall. About 49% of the analyzed data was successfully simulated for groundwater level rise by rainfall. The algorithm for groundwater level rise due to ice melting and ground freezing included graphic analysis for groundwater level versus time (day), simple linear regression analysis for groundwater level versus time, and diagnosis of groundwater level rise by new ice melting and ground freezing. Around 37% of the analyzed data was successfully simulated for groundwater level rise due to ice melting and ground freezing. The algorithms from this study would help develop strategies for sustainable development and conservation of groundwater resources.

Algorithm, Groundwater, Ground freezing, Groundwater Level rise, Ice melting, Rainfall

김동석 Dong Seog Kim , 박영식 Young Seek Park

DOI: Vol.26(No.6) 963-968, 2010

This study has carried out to evaluate the performance of direct and indirect oxidation electrode for the purpose of decolorization of Rhodamine B (RhB) in water. Four kinds of electrodes were used for comparison: Pt and JP202 (indirect oxidation electrode), Pb and boron doping diamond (BDD, direct oxidation electrode). The effect of applied current (0.5~2.5 A), electrolyte type (NaCI, KC1, HCI, Na2SO4 and H2SO4) and electrolyte concentration (0,5~2.5 g/L), solution pH (3~11) and initial RhB concentration (25~125 mg/L) were evaluated. Experimental results showed that RhB removal efficiency were increased with increase of current, NaC1 dosage and decrease of the pH. However, the effect of operating parameter on the RhB removal were different with the electrode type. JP202 electrode was the best electrode from the point of view of performance and energy consumption. The order of removed RhB concentration per energy lie in: JP202>Pt>Pb>BDD.

Direct oxidation, Dye, Electrode, Electrolysis, Indirect oxidation

이태환 Tae Hwan Lee , 이보미 Bo Mi Lee , 허진 Jin Hur , 정명숙 Myung Sook Jung , 강태구 Tae Gu Kang

DOI: Vol.26(No.6) 969-975, 2010

Estimating the organic matter loadings from individual treated sewage has become important for establishment of effective management strategies to control refractory organic matter (R-OM) in watersheds. For this study, regression equations were constructed using treated sewage data to convert the chemical oxygen demand (COD) concentrations, which are mostly available from open database, into total organic carbon (TOC) and R-OM concentrations. Effluent samples were collected from five major sewage treatment plants (STPs) located upstream of the lake Paldang. Variations in the OM concentrations were not associated with either the location of the STP or the sampling season. The effluent investigated were characterized by higher ratio of R-OM with respect to biodegradable organic matter (B-OM) and higher presence of dissolved organic matters (DOM) versus particulate organic matter (POM). Compared to COD(Mn), COD(Cr) exhibited higher oxidation efficiencies and greater variations in the concentrations. The concentrations of COD(Mn) were positively correlated with dissolved organic carbon (DOC), total organic carbon (TOC), and R-OM concentrations. There was nearly no seasonal and annual variation in the regression equations between COD(Mn) and TOC or R-OM concentrations. The constructed regression equations for TOC and R-OM were 0,650(±0,071)×COD(Mn)+l.426(±0,575) and 0,340(±0,083)×COD(Mn),+2.054(±0.670), respectively. The established equations are expected to contribute to estimating OM loadings from the STPs into the lake Paldang and also to compensating for the deficiency of the data for effluent OM concentrations in STP.

Lake Paldang, Organic carbon, Refractory organic matter, Regression analysis, Sewage treatment plants, Wastewater

오세진 Sei Jin Oh , 최찬규 Chan Kyu Choi , 허진 Jin Hur , 정명숙 Myung Sook Jung , 신현상 Hyun Sang Shin

DOI: Vol.26(No.6) 976-985, 2010

In this study, characteristics of dissolved organic matter (DOM) from Lake Paldang and seven other DOM sources (lake plankton, plants, soil, composite, treated sewage) were studied using XAD resin fractionation and 28-day microbial incubation experiment. Distribution patterns of DOM-fractions, which include hydrophilic acids (HiA), hydrophilic bases (HiB), hydrophilic neutrals (HiN), hydrophobic acids (HoA), hydrophobic neutrals (HoN) and the extent of DOM biodegradation (i.e., biodegradability) were different depending on the origins of the DOM samples. The DOM distribution pattern and the biodegradability were found to be effective for distinguishing the different DOM sources. The biodegradability (%) had negative correlations with the content (%) of hydrophobic fractions (Ho) and specific UV absorbance of DOM. which indicate that the Ho fractions contain more aromatic carbon structures and relatively stable during biodegradation, irrespective of the sources. To gain additional insight into the microbial transformation of the DOM, we also investigated the changes in the fraction`s distribution for plankton, leaf litter and composite samples after the incubation. The results showed that biodegradation of hydrophilic fraction (Hi) causes an increase in the proportion of Ho (HoA. HoN), while biodegradation of HoA increases the HoN production.

Biodegradability, Dissolved organic matter (DOM), Hydrophobic, Microbial Changes, Resin fractionation

김상단 Sang Dan Kim , 임용균 Yong Kun Lim , 김진관 Jin Kwan Kim , 강두기 Doo Kee Kang , 서성철 Seong Cheol Seo , 이재관 Jae Kwan Lee

DOI: Vol.26(No.6) 986-993, 2010

Spatially distributed on-site devices such as bioretentions and bioboxfilters are becoming more common as a means of controlling urban stormwater quality. One approach to modeling the cumulative catchment-scale effects of such devices is to resolve the catchment down to the scale of a land parcel or finer, and then to model each device separately. The focus of this study is to propose a semi-distributed model for simulating urban stormwater quantity and identifying best sites for spatially distributed on-site stormwater control devices in an urban drainage system. A detailed model for urban stormwater improvement conceptualization simulation is set up for a 0.9342 km(2).

Nonpoint source, On-site stormwater control device, Stormwater management model, Urban hydrology, Water quality

연인성 In Sung Yeon , 홍지영 Ji Young Hong , 홍은영 Eun Young Hong , 임병진 Byung Jin Lim

DOI: Vol.26(No.6) 994-999, 2010

The toxin of Cyanobacteria (blue-green algae) during summer season has been a problem and early prevention should be considered. A variety of methods can be used to forecast algal blooms and this study aims at examining feasibility of chlorophyll-α. The real-time data were collected by automatic water quality monitoring system (AWQMS) in Daecheong reservoir and invalid data were sorted by experts. And then, the sorted data were filled using linear interpolation. When the concentration of chlorophyll-α increased by 15 mg/m(3). water temperature and pH exceeded 26.8℃ and 9.5 respectively. As a result of correlation between chlorophyll-α and other parameters(i.e. water quality items and hydrological data), temperature (r=0.502-0.574). pH (r=0.583-0.681), total organic carbon (TOC, r=0.583-0.681) comparably had higher values. Meanwhile, the data around a day or two showed the highest correlation. In addition, chlorophyll-α is considered to be significantly effected by precipitation and inflow.

Algal blooms, Automatic water quality monitoring system, Chlorophyll-α, Daecheong reservoir

조혜윤 Hye Yoon Cho , 유지수 Ji Su Yoo , 한영석 Young Seok Han , 한태준 Tae Jun Han , 김상훈 Sang Hun Kim , 정진호 Jin Ho Jung

DOI: Vol.26(No.6) 1000-1007, 2010

In this study, toxicity monitoring of sediments collected from 25 stations in the Geum river basin was conducted using Daphnia magna and Moina macrocopa. According to the results of acute toxicity tests (immobilization and mortality) of organic extracts of semdiments, Miho stream showed much less toxicity than Gap and Nonsan streams. In particular, significant toxicity was observed in both species for St. 15 and St. 16 sediment samples that passed through Deajeon city as a branch of Gap stream. For Nonsan stream, St.23 sediment showed high toxicity toward M. macrocopa. This site seemed to be affected by upper agricultural industrial complex. Additionally, M. macrocopa showed a higher sensitivity than D magna for organic extracts of sediments. In the case of toxicity tests using sediment pore water and aqueous extracts, only pore water of St.27 sediment was toxic against D. magna. Toxicity identification evaluation showed that hydrogen sulfide was likely a major toxicant in the pore water.

Aqueous extracts, Organic extracts, Pore water, River sediment, Toxicity monitoring

박준대 Jun Dae Park , 오승영 Seung Young Oh , 김지태 Ji Tae Kim

DOI: Vol.26(No.6) 1008-1015, 2010

Discharged pollution load is varied as rainfall changes in the area with combined sewer system. Changes in discharged pollution load are directly related with those of sewer transfer flow. Therefore, it is important to identify the pattern of sewer transfer flow for the analysis of changes in discharged pollution load. This study reviewed the type of distribution of sewer transfer flow for 17 sewage treatment plants and developed simple formular to estimate sewer transfer flow as rainfall changes. 11 facilities showed to have some relation with rainfall in the change of sewer transfer flow but 6 facilities to have no relation. Relationships between rainfall amount and sewer transfer flow showed that 6 facilities out of 11 had relatively strong relationships above R2=0.5, which were considered to be affected directly by rainfall changes. The formular which explain the relationship between rainfall and sewer transfer flow can be applied in the analysis of rainfall effects on discharged pollution load, therefore, the more appropriate evaluation will be done.

Combined sewer system, Discharged pollution Load, Pattern of sewer transfer flow, Rainfall-Sewer transfer flow relationship, Sewer transfer flow

우영국 Young Gug Woo , 박은영 Eun Young Park , 전양근 Yang Kun Jeon , 양희정 Hee Jeong Yang , 임재명 Jay Myung Rim

DOI: Vol.26(No.6) 1016-1027, 2010

The phosphorus contribution rate on water quality of North and South-Han River, and Gyungan-cheon by effluents from environmental fundamental facilities located in upstream basin of Paldang Lake were analyzed. QUALKO2 model was selected for the analysis of contrubution rate, and was constructed considering the location of the main point sources and all facilities in study area. The pollutant loading rates and arrival rates for each unit-watershed in study area were calculated for model operation. For the calibration and verification of model, 2006 water quality dataset from Ministry of Environment and the effluent loadings of the environmental fundamental facilities were used. Reliability Index (RI) method was used to estimate the validity of the results of calibration and verification. The phosphorous contribution rate(%) for each environmental fundamental facility were analyzed by excepting the effluent loading of the facility. The contribution rate was analyzed for each facility, facility groups separated by each main river and each unit-watershed. The main results of analysis for each facility are as follows; (i) the phosphorous contribution of B1 facility is 50%, which is the highest phosphorous contribution rate among those of nine facilities in the North-Han River Basin; (ii) the highest phosphorous contribution is 55.6% from J facility among eight facilities in the Gyungan Stream Basin; (iii) 40% from E treatment facility is the highest among those of twenty eight facilities in the South-Han River Basin.

Environmental Fundamental Facilities, Improvement of Water quality, Phos phorous contribution rate, Water quality modeling

신유리 Yu Ri Shin , 윤춘경 Chun Gyeong Yoon , 이한필 Han Pu Rhee , 이승재 Seung Jae Lee

DOI: Vol.26(No.6) 1028-1033, 2010

Wastewater reuse for agricultural irrigation needs treatment and control of pathogens to minimize risks to human health and the environment. In order to evaluate the water quality of UV-treated reclaimed water, this study focused on the relationship between micro-pathogens and particulate matters. MS2 was selected as an index organism because it has similar characteristics to human enteric virus and strong resistance to UV disinfection. The turbidity and suspended solid (SS) were selected for test parameters. In this study, it was performed with different UV doses (30 and 60 mJ/cm2) for estimation of the MS2 inactivation rate using collimated beam batch experiments in the laboratory. The experiment results by turbidity or SS concentration presented that the increased concentration of them lowered MS2 inactivation. At the turbidity (below 4.27 NTU) and SS (below 1.47 mg/L) of the low level range, the inactivation of 60 UV dose is higher than 30 UV dose. However, at the turbidity and SS of the high level, the increasing UV dose did not show apparent increasing the MS2 inactivation. In quantitative microbial risk assessment (QMRA), it can confirm the trend that P(D) and turbidity concentrations have positive correlationship at the low concentration, which was also observed in SS. The QMRA can be helpful in communication with public for safe wastewater reuse and be recommended.

MS2, Particulate matter, Suspended solid, Turbidity, Ultraviolet inactivation

강철호 Chul Ho Kang , 임현우 Hyun Woo Lim , 정성운 Sung Woon Jung , 최종혁 Jong Hyuk Choi , 김종훈 Jong Hoon Kim , 최용욱 Yong Wook Choi , 이면주 Myun Joo Lee

DOI: Vol.26(No.6) 1034-1039, 2010

Variation of formation potential of THM (THMFP) by chlorination of humic acid and characteristics of water quality with γ-ray irradiation were investigated, which were divided into two categories by the order of γ-ray irradiation and chlorination in water treatment process. The group A consisted of the γ-ray irradiation followed by chlorination process of humic acid, and the group B consisted of the chlorination followed by γ-ray irradiation process. The pH, ORP, UV(254), and DOC decreased rapidly with an increase in γ-ray irradiation of 3 kGy. while conductivity was little changed. Maximum degradation ratio of chloroform in THMs of group A was 82%, while that in group B was 69%. No brominated THMs were detected at high irradiation (>3 kGy). We found that group A water treatment process was more effective in lowering the THMFP than that of group B.

Chlorination, THMFP, Water quality characterization, γ-ray irradiation

이상호 Sang Ho Lee , 이정민 Jung Min Lee , 강태욱 Tae Uk Kang , 강신욱 Shin Uk Kang

DOI: Vol.26(No.6) 1040-1048, 2010

An infiltration storage can be installed as a method of reducing runoff from catchment and increasing stream flow during the dry period by recharging groundwater. However, there is no proper model and method that can be used to design storage capacity of an infiltration storage in Korea. The purpose of the study is to evaluate capacities of infiltration storages planned on Jeju-do in Korea by modifying Storm Water Management Model (SWMM). The basic equations for the infiltration storage are same as those of the infiltration trench used in MIDUSS. Infiltration rates of the infiltration storages were first measured by double ring infiltrometers, and then the modified model was applied to evaluate adequacy for the capacities of three infiltration storages planned on Jeju-do in Korea. The application results show that the two infiltration storages with higher infiltration rates have adequate capacities to infiltrate the total water inflow to the storages. However, the other infiltration storage with lower infiltration rates has not sufficient capacity to infiltrate the total water inflow to the storage and release occurs to the downstream region. The simulation model and method applied can be used for capacity evaluation of future infiltration storages on highly pervious areas in Jeju-do.

Infiltration storage, MIDUSS, Storage capacity, SWMM