• Title, Summary, Keyword: Water Facilities

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A Study on the Appropriate Size of Large Rainwater Utilizing Facilities and Estimation of Agricultural Water Availability in Namwon eup, Jeju Island (제주도 남원읍지역 대용량 빗물이용시설의 적정규모 및 농업용수 공급 가능량 산정 연구)

  • Kim, Minchul;Park, Wonbae;Kang, Bongrae
    • Journal of Soil and Groundwater Environment
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    • v.25 no.1
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    • pp.84-94
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    • 2020
  • Jeju Island is seeking reliable ways to secure alternative water resources using rainwater in order to conserve and manage its groundwater as sustainable water resources. The purpose of this study is to investigate the rainwater storage capability of small-size storage facilities installed at farmhouses in Uigwi and Wimi of Namwon-eup region. The rainwater outflows from the storage facilities in rain events were analyzed. The appropriate size of rainwater utilizing facilities are suggested to be about 5,800 ㎥ in Uigwi area and 4,900 ㎥ in Wimi area based on the calculation from the rainfall frequency and runoff amounts. If those facilities are put into operation in Uigwi and Wimi area, it is estimated approximately 32.3 and 11.5% of total agricultural water can be supplied by the facilities. Wimi area showed low rainwater usage because of less number of facilities relative to the size of farm areas and less intensive underground water usage. It is analyzed that more than 55% of agricultural water can be supplied by rainwater if 70 facilities without the rainwater facilities are connected to the rainwater utilizing facilities.

A Study on Efficient Operation Management of Small-Scale Sewage Treatment Plants in Gyeongnam (경남지역 소규모하수처리시설의 효율적 운전관리방안 연구)

  • Park, Sung-Hwan;Moon, Sung-Yong
    • Journal of Korean Society of Water Science and Technology
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    • v.25 no.2
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    • pp.15-27
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    • 2017
  • In this study, It is to identify matter through the analysis of small-scale sewage treatment plant operations in Gyeongsangnam-do and relatively weak state facilities in winter. And It is suggested to appropriate management method at sewage treatment facilities. First, small scale sewage treatment plant treatment method is very divers. The selection of treatment method has not been made by appropriate standard. second, there are many problems that have been raised consistently such as inappropriate facilities operating ratio, sewage inflow of low concentration(less than BOD 100mg/L), inflow sewage low temperature(in winter) and inflow unknown water by uninstalled joints. Third, 12 facilities small-scale sewage treatment facilities the excess of effluent total nitrogen water quality standards(enhanced water quality in winter). Therefore, this study suggested that nitrogen and phosphate treatment efficiency improves when unification of sewage system, sealing of treatment facilities, maintenance of sewage treatment facilities pipeline and installed advanced process like total phosphate facilities.

Analysis of the cost effectiveness according to T-P standard enforcement of public sewage treatment facilities (공공하수처리시설의 총인기준 강화에 따른 비용효과분석)

  • Jeong, Won-Gu;Rim, Jay-Myung
    • Journal of Industrial Technology
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    • v.31 no.A
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    • pp.135-145
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    • 2011
  • This study was conducted to analyze the cost effectiveness in line with total phosphorus standard enforcement of public sewage treatment facilities. The additional cost for the total phosphorus removal process was calculated to analyze the cost effectiveness of the advanced water purification process. The analysis results showed that the T-P removal by coagulation sedimentation was more efficient than the advanced water purification facilities in terms of facilities investment cost, and if the coagulation filteration was used for T-P removal, the activated carbon process among the advanced water purification techniques was more efficient in terms of facilities investment cost. In this study, the effects of the T-P removal process that will be additionally introduced according to the tightening of the effluent T-P standard were analyzed within a limit. The actual benefits of improved T-P concentration in the water source will provide diverse values, including the leisure water, environment improvement water, eco-system in the water source and industrial water, in addition to the advanced water purification.

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Real-time Water Monitoring System for Small Water Supply Facility using High Reliable Wireless Sensor Network (고신뢰 무선센서네트워크를 이용한 실시간 수질 모니터링 시스템)

  • Kang, Hoyong;Jang, Youn-Seon
    • Journal of Sensor Science and Technology
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    • v.24 no.5
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    • pp.331-341
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    • 2015
  • In this paper, real-time water quality monitoring system of small water supply facilities based on IEEE 802.15.4e-2012 DSME MAC and IEEE 802.15.4g-2012 PHY standard is presented, which is capable to acquire for highly reliable water quality information in the wide outdoor areas for effective water quality management of small water quality facilities is distributed in the long distance and remote areas. Previously, Long distance transmission is difficult in most water quality sensor module is using RS-485 protocol. But with this system, even in harsh outdoor environment, it is possible to establish a radio wave sensor in a wide area network, and not only water quality sensor shall be connected to the wireless system, but also wireless integrated management system shall provide more effective way of management of the numerous small water supply facilities spread throughout the community, so that the administrator can remotely monitor the data of water turbidity, pH, residual chlorine in the water-supply, water-level, and generate alarm to cope with risks. The management of small water facilities is done by residents will be very effective to notice water quality information of small water facilities to residents.

A Study on Water Quality Management Methods of Waterscape Facilities in Accordance Legislation of Water Quality Criteria (수질기준 법제화에 따른 물놀이형 수경시설의 수질관리방안 연구)

  • Na, Kyung-Ho;Yong, Jeong-Ju;Kim, Ji-Soo;Byeon, Ju-Young
    • Journal of Korean Society on Water Environment
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    • v.33 no.4
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    • pp.487-493
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    • 2017
  • This study was conducted to propose measures of water quality management as the water criteria for waterscape facilities which have been highlighted as alternatives to wading pools in summer season was legislated. The number of public waterscape facilities has reached 290 sites in Gyeounggi province and 971 sites in South Korea in 2017. The water tank capacity of 80.3 % public waterscape facilities was less than $100m^3$. Facilities with disinfection system were only 6.5 % and facilities with filtration function were also very low at 6.9 %. Most of the waterscape facilities, about 93%, are expected to be vulnerable to complying with revised water quality criteria because they have to be disinfected by handling. Chlorine disinfectants, which are more persistent than ozone or ultraviolet sterilization methods, are more preferred. However, care should be taken when adding disinfectans because hypochlorous acid, which is an effective component of chlorine disinfectant, remains after the disinfection, but it is easily decomposed with time. For this study, ${\bigcirc}{\bigcirc}$ park floor fountain with a capacity of $63m^3$ was selected and the amount of free residual chlorine concentration was measured by injecting a certain amount of chlorine bleach. As a result, it took 5 hours to decrease from the water quality standard of 4 mg/L to 0.04 mg/L. If the waterscape facility is operated for 7 to 8 hours, the chlorine bleach should be re-injected after 5 hours. In addition, the problem of pH increase due to the input of chlorine disinfectant is expected, and the neutralization method using vinegar was proposed.

A Study on the Simple Piped Water Supply System in a Rural Area (일부 농촌지역의 간이 상수도 운영실태와 개선 방안에 관한 조사연구)

  • 정문호
    • Journal of Environmental Health Sciences
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    • v.17 no.1
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    • pp.57-66
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    • 1991
  • This study was carried out for 5 years between 1984 and 1986 and 1989 and 1990. This interviewers visited 292 households to evaluate the perception of the residents using .the. Simple Piped Water Supply (SPWS), and examined the pollution source surrounding 42 SPWS facilities and water quality by the chemical and microbiological method. The purpose of this study was to find out problems linked with SPWS and to investigate more efficient way of improvement in rural water supply. The results of the study are surmnarized as follows: 1) Approximately 55% of the sampled population have been served by simple piped water supply. 2) The drinking water was mostly taken from the springs in 16 sites and valley water in 26 sites. 3) Considering the type of distribution of the SPWS, there are 28 natural gravity systems and 14 pumping systems. 4) Out of the 180 SPWS in Chun Sung Area, 74% of the SPWS facilities were used more than ten years. In addition, 40% of residents expressed the need for repairs of old facilities. 5) 48% of the SPWS facilities are neighbored with pollution source. 6) 50% of the maintenance crews were not committed totheir job but instead, the facilities were operated by some residents or community leaders who were personally concerned about quality of the facilities. 7) About 85% of the residents answered that SPWS was convenient and helpful. 8) About 57% of the residents complaind that the amount of daily water supply is not adequate. 9) About 74% of the residents felt that the water quality is high for dringking water and therefore, 52% of the facilities were not properly chlorinated. But in contrast, the biochemical tests indicated that only 28% of the SPWS met the dringking water quality standards. 10) Maintenance cost per a household ranges form 500 to 2, 000Won (1 $ = 700 Won) a month. Most of the cost was to cover the power electric charge. For the effective maintenance and arrangement of the facilities, gorvermental financial support for the maintenance is strongly recommended.

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A Study on the Total Head Decision of Pump for Regional Water Supply Facilities (광역상수도용 펌프의 전양정 결정에 관한 연구)

  • Kim, Kyung-Yup;Suh, Sang-Ho;Lee, Jung-Woo;Roh, Hyung-Woon;Kim, Sang-Gyun
    • 유체기계공업학회:학술대회논문집
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    • pp.165-170
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    • 2001
  • An extensive range of pumping facilities are employed in the regional water supply system in metropolitan areas, and optimization and the systematic combination of the Pump facilities have direct bearing on the stability and economy of the water supply system concerned. These systems must be able to guarantee stability, efficiency and offer high reliability. Preparation of metropolitan area regional water supply system construction project must include a basic plan which takes into account the suitability of pumping facilities to be used, the environment in which facilities will be installed, man-power requirements and basic operational and management policies. This paper contains over-all analysis of the management of metropolitan area regional water supply systems as like Jayang, Paldang 1st pump station. In the study, it aims to prepare counterplan which will be operated and managed the pump upon the operational conditions and to suggest the proposal for water facilities codes to decides total head of pump in Korea.

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Condition evaluation method of terminal station facilities for hydrological observation system (수문관측시스템 단말국 설비 성능분석을 통한 상태평가 방안)

  • Hong, Sung-taek;Kim, Jun-hee;Kim, Il-han;Lee, Ho-hyun;Choi, Ki-sun
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.181-183
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    • 2013
  • In case of hydrological observation system, Life time of facilities is different with operating environment and frequency of use. So, the durable year of the facilities is only considered to replace the facilities at present. Thus, system management is needed economical assesment based on condition evaluation through performance analysis of facilities. This research makes a proposal for scientific condition evaluation table through physical assessment, performance analysis assessment, durable years assessment about satellite communication facilities being used in K-water. Consequentially, reasonable replacement plan is established for satellite communication facilities.

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Legislative and policy issues related to the advancement of the maintenance system of water resource facilities (수자원시설물의 유지관리 체계 선진화를 위한 입법 및 정책과제)

  • Lee, Giha;Yeon, Minho;Lee, Daeeop;Kim, Seongwon;Kim, Jinsoo
    • Journal of Korea Water Resources Association
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    • v.53 no.spc1
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    • pp.773-784
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    • 2020
  • In this study, legislative and policy issues related to advancing the maintenance system of water resource facilities were presented by investigating and analyzing the degree of aging and management status of water resource facilities. Data from the comprehensive Facility Management System (FMS) operated by the Korea Infrastructure Safety Corporation were collected and used to analyze the aging of water resource facilities. Using safety grade data categorized by facility, type, local area, and grade, the ratio of dangerous facilities and the aging rate were calculated to analyze the status of water resource facilities and guidelines and manuals related to water resource facilities were investigated. Through this, four required actions to address legislative and policy issues were presented: 1) Readjusting the scope of water resource facilities and supplementing guidelines and manuals, 2) Establishing a maintenance system considering changes in disaster conditions, 3) Improving the FMS and activating standard linkage services, and 4) Establishing a facility asset management system.

Necessity of Strengthening Small-Scale Wastewater Discharge Facilities Management (소규모 폐수배출시설 관리 강화의 필요성)

  • Park, Jae Hong;Rhew, Doug Hee
    • Journal of Korean Society on Water Environment
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    • v.34 no.2
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    • pp.226-233
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    • 2018
  • Small-scale wastewater discharge facilities account for 98% of all workplaces, but in the generation and emission of major pollutants, they account for 27.5 % and 23.5 %, respectively. Since the proportion of the emission load of the small-scale workplace is not large, the national environmental policy has been established mainly around large-scale wastewater discharge facilities. However, in the case of specific hazardous substances in water, the amount of the discharge load of the small-scale wastewater discharge facility was 2.4 times higher than that of the generation load. Certain types of specific hazardous substances in water, which have a higher discharge load than large-scale wastewater discharge facilities, account for 24 ~ 32 %. There are also cases in which the discharge load from a small-scale discharge facility is more than four times higher, depending on the specific kind of water pollutant. As a result of inspections, the violation rate of the small-scale wastewater discharge facility among the total violations by facilities is 93.9 ~ 97.5 %. As a result, the ecotoxicity value of small-scale wastewater discharge facilities was high in most industries, and there was a fluctuation in the measured value. This indicates that the ecological integrity of the water system can be largely influenced by small-scale wastewater discharge facilities. Therefore, it is necessary to expand the environmental management of small-scale wastewater discharge facilities, and in some cases, the effect of the improvement in quality may be more significant than in the management of large-scale wastewater discharge facilities.