유역인자의 회귀분석에 의한 저수지내 퇴사환경 예측

서승덕,조성현 경북대학교 환경과학연구소 1988 環境科學硏究所論文集 Vol.2 No.1

This study was carried out on the purpose of analizing the annual specific sediment necessary for meeting with the decrease of reservior capacity, and its vice - product due to inflowing sediment from the upper stream of watershed that has caused problem in the field of an irrigation reservior project including design and management. 22 reservoirs at the Nakdong river system in Kyong Pook province and 22 reservoirs at the Yongsan river system in Jonnam province are selected for the reservior sedimentation study by the simple and multiple regression analysis of the relationship between the annual specific sediment and the physical characteristic values of stream and watershed for this study. The results obtained are as follows ; The average ratio of reservoir capacity decrease was 8.7% for average age 30.4 years in Kyongpook province,11.1% for average age 36.6 years in Jonnam province and 10% for average 34 years in total. 2. This study analized simple and multiple regression relationship between the annual specific sediment (SS) and the physicil characterstic values ; drainage area (A), the ratio of main stream slope to draingage area (S/A), main stream length (L) and trap efficiency (Te). In the simple and multiple regression analysis, the available relationship having R=0.747-0.941 and R=0.952-0.964 was showed.

경북지역 농촌공업화 단지조성사업이 지역개발에 기여하는 영향평가

서승덕,천만복,윤학기,윤경식 한국농공학회 1990 한국농공학회논문집 Vol.32 No.4

Government has propelled strongly the Agricultural - cum - Industrial region development project in the nation wide. This project will not only provide employment opportunity for rural inhabitants, but also be designed to activate the rural economy. In addition, it will lead to a balanced development between the urban and rural areas. Under this project, building sites of 3 to 30 hactres will be established in the rural area in order to settle factories which are suitable to the rural condition. In this report, the researches which relating to the achievement conditions of planning, design and constructions of the building sites and the contribution conditions of Agri. - cum - Industrial Region development projects, activated to the rural economy and regional development in the Kyungpook regional areas, were surveyed and studied. On the average evaluation studies the results are as follows : 1. The achievement conditions of the planning, design and construction of the building sites. Very good 27.0 % Good 47.0 % Fair 24.0 % Poor 2.0 % 2. The contribution conditions of the Agri - cum - Industrial factories managements. Very good 17.0 % Good 41.0 % Fair 32.0 % Poor 10.0 %

자연하천의 공수추적과 저유량해석

서승덕 한국농공학회 1967 韓國農工學會誌 : 전원과 자원 Vol.9 No.2

유역의 지상적 요인과 저수지 비퇴사량과의 관계분석

서승덕,박흥익,천만복,윤경덕 한국농공학회 1988 한국농공학회논문집 Vol.30 No.4

The purpose of this study is to develop regression equations between annual specific sedi- ment of reservoirs and physiographic factors of watersheds. 122 irrigation reservoirs, which have irrigation areas equal to or larger than 200 ha, located in Korea except Cheju province are used in the analysis. Simple regression analyses between the specific annual sediment and each of the physical characteristic factors of the reservoirs are carried out at first. Then, multiple regression analyses between the annual specific sediment and the physical characteristic factors with high correlation coefficients in the simple regression analyses are made. The results obtained from this study are as follows : 1. The results of the sirnple regression analyses show that in each province the watershed area, the length of mainstream, the circumferential length of watershed have high cor- relation coefficients (R=0.814-0.986), and that drainage density, reservoir capacity per watershed area, drainage frequency, basin relief have low correlation coefficients (R=0. 387-0.955). 2. The purposed multiple regression equations between the annual specific sediment of reservoirs and three major characteritic factors of watersheds, namely, the watershed area, the circumferential length of watershed, and the length of mainstream, are proposed as given in Table 2. 3. The result of the simple regression analyses with respect to the reservoir elevation except Jeonnam province, which has very different characteristics comparing to other provinces, shows that watershed area, main stream length and circumferential length have high correlation coefficients (R=0.806-0.884) in low-elevation reservoirs and intermediate- elevation reservoirs, but low correlation coefficients (R=0.639-0.739) in high-elevation reservoirs. 4. With respect to the reservoir elevation, the proposed multiple regression equations bet- ween the annual specific sediment of reservoirs and the three major characteristic factors of watershed which have high correlation coefficients are proposed as given in Table 5.

農業用水의 水質環境 調査分析

徐承德,金泰漢,尹慶悳 COLLEGE OF AGRICULTURE KYUNGPOOK NATIONAL UNIVERSI 1983 慶北大農學誌 Vol.1 No.-

Total annual water reqirements for agricultural use are exceedingly large. In many areas of the country, particularly in the arid regions, irrigation water requirements comprise the bulk of the total developed water supply. On the other hand, we are, at present, poorly prepared to evaluate the hazards of many substances in the water phase of the agricultural environments. This study is to survey the water quality phase of agricultural conditions and to give some ideas to prevent disasters from the environmental hazards such as PH, Electric Conductivity, BOD, DO, Cu, Pb, and Cd. In the analysed results, mean PH was 6.5 to 7.8, maximum EC was 200 μΩ/cm at 25℃, the maximum BOD was less than 10ppm (standard value), the DO was 4.2 to 12.0 mg/L (standard value is more than 2.0 mg/L) and the Cu, Pb, Cd were estimated in scope of safety value respectively. Especially BOD is gradually closed with the hazardous point in the few places. At present, the hazardous environmental conditions originated from the municipal sewage, industrial waste, and human and domestic animals excrements etc. have to strongly be improved much better than before.

하구방조제의 홍수조절 해석

서승덕 한국수자원학회 1977 한국수자원학회논문집 Vol.10 No.2

Alone the southwesten coast of Korean peninsula, the extensive available arable acreages suited for forming are found in the development of tidal flats in the geographically curved bays with a motable tidal emplitude. It was found that the developments of these tidal flats cover an estimated area more than 276,000ha. In this paper, a flood control system by Pul's Storage Indication Method and Pul's Graphical Method at Return Periods-50 yrs, design rainfall-267mm per 48hrs and design flood-926c.m.s. and at 0.2meter control height above the High Water Ordinary Spring Tide Level (+11.0m) was studied. At the result, the flood demage in the reservoir at Return Periods-50 yrs and the tidal level at H.W.O.S.T.L. were satisfied to the below E.L. 11.20m (Flood Level in the reservoir). Well skilled flood control technique and management and control of draining sluice gate should be required for the disaster prevention from the flood and tide damage.

세계대강의 유송토사량 현황

서승덕 한국수자원학회 1969 한국수자원학회논문집 Vol.2 No.2

머스킹감 홍수추적법상의 수문상수해석

서승덕 한국수자원학회 1972 한국수자원학회논문집 Vol.5 No.1

수문학연구의 동향(미국, 일본편)

서승덕 한국수자원학회 1974 한국수자원학회논문집 Vol.7 No.1

관행수리행 위의 보호

서승덕 한국농공학회 1986 한국농공학회논문집 Vol.28 No.2