Runoff Characteristics of Non-Point Source according to Cultivation Activity in River District

Abstract

The field study was carried out to investigate runoff characteristics of non-point source (NPS) by cultivation activity in river district. Two sites were selected mainly as G region (paddy field, green house), located in Kwangju, Gyeonggi Province, and S region (ordinary field), located in Namyangju, Gyeonggi Province, those belong to Paldang reservoir watershed. The paddy field with water storage capacity showed a slow increase in runoff as rainfall intensity increases. Meanwhile, both green house and ordinary filed revealed a rapid increase. The average BOD runoff concentration of paddy field, green house, and ordinary field was 2.0 mg/L, 2.8 mg/L, 7.9 mg/L, respectively. It indicates that ordinary field shows the highest value in BOD, SS, T-N, and T-P concentration due to the soil loss during rainfall. As a result of runoff load estimation according to the field, a T-N runoff load of paddy field was 1,793.9 kg/year, higher than that of ordinary field. It was estimated that a SS runoff load of ordinary field was 69,704 kg/year and accounts for more than 70% of overall runoff load.

Statistical Analysis and Review of Event Mean Concentrations in Stormwater Runoff from Agricultural Nonpoint Source Pollution among Different Land Use Types

“…국내의 경우, 농업비점오염원에 대한 다양한 연구가 활발히 진행되어 왔으나 조사지역의 토지이용형태, 선행무강우일수, 강우량, 강우유출률, 작물의 종류, 퇴비의 양 등 자연적, 인위 적 여러 요인들의 복합적 함수에 따른 다양한 특성을 보이 며, [24][25][26][27][28] 특히 토지이용형태에 따라 많은 차이를 보이고 있 다. [31][32][33][34][35] 따라서 본 연구에서는 다양한 연구에서 조사된 EMCs 및 원단위를 생활계, 축산계, 양식계 등 다른 오염원의 유입이 비교적 최소화된, 농업비점오염원의 유입이 지배적인 지역을 대상으로 토지이용형태에 따라 논, 밭, 고랭지 밭, 비닐하우스 로 분류하였다. 이후 토지이용형태별로 분류된 EMCs와 원단 위 데이터를 정량 및 정성적으로 통계학적 비교･분석하여 그 특징을 규명하고자 하였다.…”

Characteristics of Temporal Variation on Water Quality (T-P, T-N, CODMn, SS, BOD5) in the Jungrang Stream during Rainfall Event

“…발생하는 수질오염물질은 강 우에 의해 매우 민감하게 반응한다. 5,6) 또한 강우 유출수는 강우가 시작되면서 초기강우에 의해 수질오염도가 높아지 는 특성을 지니고 있으며, 7) 유출된 수질오염물질은 지역 및 시간적 특성에 따라 다르게 나타난다고 보고되고 있다. 8) 강우 시 중랑천 유역의 수질(T-P, T-N, CODMn, SS, BOD5)변화 특성 대한환경공학회지 제36권 제6호 2014년 6월 13,14) 에 준하는 방법으로 진행하였으며, 그 방법은…”

Analysis on the Performance Evaluation of a High-Speed Filtering Apparatus for the Treatment of Combined Sewer Overflows (CSOs)

“…The degree of water pollution caused by the water pollutants discharged during rainfall gradually increases with the increasing flow rate [5], and the water pollutants respond to rainfall very sensitively [6,7]. In addition, rainfall runoff has a characteristic of increasing the degree of water pollution due to the initial rainfall [8], and the discharged water pollutants are reported to vary depending on the regional and temporal characteristics.…”