• KIEAE Journal
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• 제14권3호
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• pp.15-21
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• 2014

In this study, we developed a modular rainwater infiltration system that can be applied for general purposes in urban areas to prepare for localized heavy rain caused by climatic change. This study also analyzed the system's effects on reducing runoff. An analysis of the system's effects on reducing runoff based on rainfall data and monitoring data obtained between September 2012 and December 2013 after the system was installed showed that approximately 20~22% of the runoff overflowed from the infiltration facility. Also, an analysis of the runoff that occurred during the monsoon season showed that 25% of the runoff overflowed through the storm sewer system of the urban area. These results show that the rainwater overflows after infiltrating the detention facility installed in the area during high-intensity rainfall of 100mm or higher or when precipitation is 100mm for 3~4 days without the prior rainfall. According to precipitation forecasts, torrential rainfall is becoming increasingly prevalent in Korea which is increasing the risk of floods. Therefore, the standards for storm sewer systems should be raised when planning and redeveloping urban areas, and not only should centralized facilities including sewer systems and rainwater pump facilities be increased, but a comprehensive plan should also be established for the water cycle of urban areas. This study indicates that decentralized rainwater management can be effective in an urban area and also indicates that the extended application of rainwater infiltration systems can offer eco-friendly urban development.

• 자원환경지질
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• 제48권6호
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• pp.467-475
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• 2015

덕진연못은 전주를 대표하는 명소이나, 수질이 불량한 상태이다. 본 연못은 저수량 $88,741m^3$에 $3.77km^2$의 집수유역을 가진다. 그러나 무분별한 도시화로 인하여 덕진연못으로 유입되는 과거 하천이 차단되었고, 상류에서 양수되는 지하수와 수면에 내리는 강우로만 유지되고 있는 실정이다. 양질의 물갈이용수 부족은 호저에 쌓인 유기퇴적물과 함께 덕진연못 수생태환경 악화의 주범으로 지목되고 있다. 본 연구에서는 덕진연못 수생태 유지용수확보방안에 대하여 고찰하였다. 본 연구결과, 현재의 배수시스템을 개발이전으로 복원한다면 강우유출량만으로도 덕진연못을 연간 32회 물갈이 할 수 있는 것으로 분석되었다. 이와 같은 논리를 뒷받침하기 위하여, 양호한 수질상태를 보이는 인근의 오송지의 상태와 비교하였다. 오송지는 집수구역면적은 $0.535km^2$으로 덕진연못의 약 1/7에 불과하지만, 저수량은 $47,200m^3$으로 덕진연못의 반이 넘는다. 작은 집수구역으로도 오송지가 건강한 수생태환경을 보이는 이유는 강우의 상당부분이 땅으로 침투되어 오송지로 서서히 유입되는 자연배수시스템을 갖추고 있기 때문이다. 저영향개발(LID)은 물순환상태를 개발이전의 상태로 복원하는 도시개발기법이다. 덕진연못 유역 내에 내린 강우가 자연적인 방식으로 배수될 수 있도록 LID기법을 응용한다면 덕진연못 물갈이용수 확보는 충분히 가능할 것으로 보인다.

• 한국작물학회지
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• 제27권4호
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• pp.385-397
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• 1982

The climatic impacts have been the environmental constraints with soil characteristics to achieve self sufficiency of food production in Korea. In this paper, the distribution and appearance of impacts and the changes in climatological status due to recent trend of early transplanting of rice are widely discussed to derive some countermeasures against the impacts, being focussed on cultural A long term analysis of the climatic impact appearances of the last 74 years showed that drought, strong wind, flood, cold spell and frost were the major impacts. Before 1970's, the drought damage was the greatest among the climatic impacts; however, the expansion and improvement of irrigation and drainage system markedly decreased the damage of drought and heavy rain. The appearance of cold damage became more frequent than before due to introduction of early transplanting for more thermophilic new varieties. Tongillines which were from Indica and Japonica crosses throw more attention to cold damage for high yields to secure high temperature in heading and ripening stages and lead weakness to cold and drought damage in early growth stage after transplanting. The plants became subject to heavy rain in ripening stage also. For the countermeasures against cold damage, the rational distribution of adequate varieties according to the regional climatic conditions and planting schedule should be imposed on the cultivation. A detoured water way to increase water temperature might be suggestable in the early growth stage. Heavy application of phosphate to boost rooting and tillering also would be a nutritional control method. In the heading and ripening stages, foliar application of phosphate and additional fertilization of silicate might be considerable way of nutritional control. Since the amount of solar radiation and air temperature in dry years were high, healthy plants for high yield could be obtained; therefere, the expansion of irrigation system and development of subsurface water should be performed as one of the national development projects. To minimize the damage of strong wind and rainfall, the rational distribution of varieties with different growing periods in the area where the damage occurred habitualy should be considered with installation of wind breaks. Not only vertical windbreaks but also a horizontal wind break using a net might be a possible way to decrease the white heads in rice field by dry wind. Finally, to establish the integrated countermeasures against the climatic impacts, the detailed interpretation on the regional climatic conditions should be conducted to understand distribution and frequency of the impacts. The expansion of observation net work for agricultural meteorology and development of analysis techniques for meteorological data must be conducted in future together with the development of the new cultural techniques.

• 농촌계획
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• 제29권1호
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• pp.69-79
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• 2023

Uiseong-gun, Gyeongsangbuk-do, one of the representative small rain regions, has developed a traditional irrigation farming system while overcoming and adapting to unfavorable agricultural environments from the days of the ancient nation of Jomunguk to the present. In 2018, its value was recognized and designated as Nationally Important Agricultural Heritage System No. 10. This study was conducted with the purpose of examining the characteristics of the traditional irrigation farming system in Uiseong from the viewpoints of irrigation facilities, irrigation communities, and agricultural activities. The research results are as follows. Uiseong-gun has been expanding irrigation facilities for agriculture since long ago, and it has been investigated that a total of 6,227 irrigation facilities are currently distributed along the Wicheon water system that crosses Uiseong-gun from east to west. Irrigation facilities appear differently depending on the topography. The irrigation facility has a 'su-tong' as an irrigation passage and a corkscrew structure 'mot-tchong' as a water quantity control device, so the amount of water was adjusted as needed. Through this facility, surface water with warmer temperature is supplied to the farmland to prevent cold damage to crops. Uiseong has developed activities to organize irrigation communities in one village or several villages to secure agricultural water from an early age. Currently, this tradition continues, and a total of 213 irrigation communities manage 375 irrigation facilities (6.0% of all irrigation facilities). Through this organization, called Mong-ri-gye, water for agriculture is obtained, managed, and distributed equitably. In order to increase agricultural production, Uiseong implemented double cropping by converting rice fields and fields. In the case of Mt. Geumseong, double cropping of rice and barley was mainly carried out until the 1970s, but since the 1980s, double cropping of rice and garlic has been implemented with higher income. One of the unique features of the agricultural system of this region is the spectacular landscape that changes simultaneously from field to rice field in spring and from rice field to field in autumn.

• 한국지하수토양환경학회지:지하수토양환경
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• 제13권1호
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• pp.43-51
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• 2008

광릉 수문연구부지 내 원두부 소유역에서 천부 관측정 G1, G4를 대상으로 2006년 2월부터 10월까지 5분 간격으로 관측한 지하수위 변동자료에 대한 주기적 변동원인과 그 영향을 분석하였다. 지하수위는 일주기의 반복성을 보이며, 겨울에서 여름으로 갈수록 변동폭이 증가하였다. 지하수위 관측 자료의 파워스펙트럼 분석 결과, 24.38시간의 일주기 성분과 12.19시간의 반일주기 성분이 나타나며, 이는 각각 지구 조석 성분 중 $P_1$ 분조와 $L_2$ 분조에 근접하다. 일주기 성분은 겨울에 비해 여름에 더 큰 power를 나타내어 지하수위가 조석 뿐 아니라 증발산에 의한 영향까지 함께 받고 있음을 보여준다. 또한 강우 직후의 지하수위 자료에서는 일주기 성분이 감소하는 현상 역시 일주기 성분에 증발산이 큰 영향을 미치고 있음을 지시한다. 조석과 증발산에 의한 지하수위 변동은 일주기 성분이 $0.4{\sim}4.2$ cm, 반일주기 성분은 $0.2{\sim}0.7$ cm 정도의 영향을 미친다.

• 한국정보통신학회논문지
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• 제17권11호
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• pp.2745-2752
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• 2013

강우량을 측정하는데 있어서 전도형 및 중량형 강수량계가 전 세계적으로 오랫동안 사용되어 지고 있다. 그러나 종래의 강수량계는 관측오차와 자체 분해능의 한계로 인해 측정범위가 제한되는 문제가 있다. 본 논문에서 제안된 강수량계는 유량측정을 통해 강수량을 환산하는 원리를 최초로 적용하였으며, 개발된 모델을 국가공인교정기관(KOLAS)에서 표준교정시스템을 이용하여 실내실험을 실시하였다. 그 결과, 본 연구에서 개발된 강수량계는 실험조건에서 설정한 20~420 mm/H의 강우강도 구간에 걸쳐 ${\pm}2%$의 오차율을 나타냈고, 종래 대비 보다 정확하고 신뢰성 있는 측정이 가능함을 보였다.

• 한국작물학회:학술대회논문집
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• 한국작물학회 2022년도 추계학술대회
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• pp.90-90
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• 2022

Nicaragua is located in Central America, climatic conditions are considered tropical dry forest. Statistics reflex that in Nicaragua exits 24,000 rice farmers. National rice production only covers 73% of the national consumption. It exists two sowing system: irrigation and rainfed. Varieties used in both systems are mid-late maturity (120-135 days), there are 14 released varieties for irrigation, eight for rainfed, and eight landraces used in rainfed. The current breeding system (introduction of lines from Colombia) has increased the national production, however, has some limitation due to the lack of enough variability, reducing the proability of finding good genotypes and therefore the possibility of satisfying 100% of the demand. The purpose of this study was to analyze the problems that must be resolved in the short and long term to improve rice productivity in Nicaragua. In this paper we explain some proposal for an improvement plan. The selection of varieties with high adaptability to various cultivation environmental conditions it is necessary, also to thoroughly manage seed purity to supply certified seeds. In rice cultivation technology, it needs to improve seedling standing and weeding effect by improving soil leveling and water-saving cultivation technology. Also, proper fertilization and planting density must be established in irrigated and rain-fed areas. Furthermore, capacity must be strengthened by collecting and training with the most recent agricultural technology information, as well as by revitalizing the union rather than the individual farmer. It is necessary to develop varieties highly adaptable to the Nicaraguan cultivation environment, as well as to expand irrigation facilities and cultivation technology suitable for weather conditions in rain-fed areas. Last, it is necessary to maintain the consistency of agricultural policy for continuous and stable rice production in response to climate change events such as drought or intermittent heavy rain.

• 상하수도학회지
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• 제33권3호
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• pp.177-190
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• 2019

The purpose of this study was to analyze the effects of sewerage facilities through I/I analysis by rainfall by selecting areas where storm overflow diverging chamber is remained due to the non-maintenance drainage equipment when the sewerage system was reconstructed as a separate sewer system. Research has shown that wet weather flow(WWF) increased from 106.2% to 154.8% compared to dry weather flow(DWF) in intercepting sewers, and that the WWF increased from 122.4% to 257.6% in comparison to DWF in storm overflow diverging chamber. As a result, owing to storm overflow diverging chamber of partially separate sewer system with untreated tributary of sewage treatment plant, rainfall-derived infiltration/inflow(RDII) has been analyzed 2.7 times higher than the areas without storm overflow diverging chamber. Meanwhile, infiltration quantity of this study area was relatively higher than that of other study areas. Therefore, it is necessary to reduce infiltration quantity through sewer pipe maintenance nearby river. Drainage equipment maintenance should be performed not to operate storm overflow diverging chamber in order to handle the appropriate sewage treatment plant capacity for rainfall because it is also expected that RDII due to rain will occur after maintenance. In conclusion, it is necessary to recognize aRDII(allowance of rainfall-derived infiltration/inflow) and to be reflected it on sewage treatment plant capacity because aRDII can occur even after maintenance to the complete separate sewer system.

• 한국수자원학회논문집
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• 제54권12호
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• pp.1329-1338
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• 2021

강우레이더는 시공간적으로 높은 해상도의 레이더 강우를 제공하고 있으며, 이러한 레이더 강우는 초단기 예측 강우 모형의 입력자료로 활용 될 수 있다. 한국건설기술연구원은 레이더 강우로부터 추정된 초단기 예측 강우 자료를 활용하여 돌발홍수 예측 정보를 실시간으로 제공할 수 있는 돌발홍수 예측시스템을 개발하였다. 그러나 레이더 편파변수에 오차가 존재하는 경우 레이더 강우의 정확도는 낮게 나타날 수밖에 없으며, 이에 따라 초단기 예측 강우 자료의 정확도 역시도 낮게 나타날 수밖에 없다. 이에 본 연구에서는 레이더 강우의 정확도를 실시간으로 향상시키기 위해 레이더 편파변수 오차를 실시간으로 보정하는 프로그램을 개발하였다. 이를 위해 먼저 비슬산 레이더의 과거 363개의 강우사례에 편파변수 편의 보정에 따른 효과를 비실시간으로 검증하였다. 그 결과 편파변수의 오차 보정 시 레이더 강우의 정확도(1-NE) 수준은 약 70% 내외의 수준으로 나타났으며 상관계수는 0.8 이상으로 나타났다. 또한 실시간 편파변수 오차 보정 프로그램을 수행한 결과에서도 레이더 강우의 정확도(1-NE)를 약 70% 내외의 수준까지 향상시킬 수 있었다.

• 한국지리정보학회지
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• 제14권4호
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• pp.63-76
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• 2011

본 연구는 사전재해영향성평가에서 토양유실 분석을 위한 모형을 개발하는 것을 목적으로 하고 있다. 토양유실 분석모형은 클라우드 컴퓨팅 개념을 도입한 인터넷기반 토양유실 분석 시스템과 HyGIS와 연계한 독립형(stand alone) 형태로 개발하였다. 인터넷기반 토양유실 분석 시스템은 사용자가 별도의 SW라이센스의 요구없이 또한 DEM, 토지피복도 등의 기본데이터를 구비할 필요없이 사용자가 직접 강우인자 등의 여러 인자를 적용하여 토양유실 분포도를 작성할 수 있도록 하였다. 또한 HyGIS와 연계한 토양유실 분석 모형의 개발 툴은 GEOMania GMMap2009의 Add-on 형태로 개발하였고, OECD에서 제안한 토양유실 위험 등급도도 작성할 수 있도록 개발하였다. 두 모형에 대한 토양유실 분석 적용 결과 두 모형 모두 사용상 매우 편리하게 개발된 것으로 판단된다. 향후 다수의 관측소 자료를 이용한 R값 계산, 유역 출구로 이송되는 토양을 분석하는 연구를 통해 본 모형을 지속적으로 개선할 계획이다.