하천의 물리적 평가방법의 비교연구
저자
발행사항
공주 : 공주대학교 대학원, 2010
학위논문사항
학위논문(석사)-- 공주대학교 대학원 : 조경학과 2010. 6
발행연도
2010
작성언어
한국어
발행국(도시)
충청남도
기타서명
(A) comparative study on physical evaluation methods of streams
형태사항
iv, 94장 : 삽도 ; 26 cm
일반주기명
참고문헌: p.92-94
소장기관
Until now, many physical assessment of the rivers have been studied. But there have been no such feasibility studies nor the verifications. Therefore, in this study, I intend to find and improve the problems of the physical assessment methods and the differences between the assessment methods, and improve them as easy, fast and accurate assessment methods.
I have organized the physical assessment methods of the rivers which have been so far studied in our country through the research of the literature, assessed & compared the river of Cheonan-Si by using " The assessment of the waterside environment" out of " The development of assessment method for the natural characteristics of the small and medium sized rivers" and the part of "The survey of the health of the water-ecosystem and the assessment by the Ministry of Environment" and have developed the improvement plan.
As a result of study, the difference of the rating between the two assessment have been revealed and as a result of the comparison of the assessment factors, these assessment methods have differences in assessment items, procedures, measures, and units.
In respect of the assessment of natural characteristics of the rivers, criterion with items including the variety of width, the variety of the bottom materials may incur confusions to the assessor, and in the respect of the assessment of the inhabitation and the waterside environment, the items including the widths of riversides, the status of the bottom materials, the maintenance of water channels and the level of the natural characteristics of the water channels may incur the confusions to the assessor. I therefore suggested the quantified criteria of LAWA.
In respect of the assessment of the inhabitation and the waterside environment, because the items including the materials for the bank revetment and the use of the land beyond the banks are assessed without the left river side and the right riverside separated for the survey, it is difficult to know accurately the status and maintenance of the rivers. So I improve the assessment method in a way of separating the left river side and the right riverside.
In respect of the assessment of the inhabitation and the waterside environment, items including the inflow of pollutants and the purification facilities are not appropriate for the a physical assessment items and they are replaced by the item of the special riverbed structures.
In respect of the assessment of the inhabitation and the waterside environment, I suggested the 5 scales system for the sake of easy comparison of the result of the assessment by tuning it with the scales from the other assessment methods and also for the sake of the global trend(EU recommends 5 scales system).
In respect of the assessment of the inhabitation and of the waterside environment, because the length of survey is as long as Maximum 2KM and the survey scope of the protected lowland is as 500M wide, including too wide scope, there is a risk of confusing the surveyors. Considering the easiness, the expression of the assessment result and the visibility with naked eyes, I suggested that for the length of the river survey, 100∼150M is appropriate and for the survey scope of protected lowland, 50∼100M is appropriate.
In respect of the assessment of the inhabitation and the waterside environment, only whether there the assessment result has been verified or not and the status of the rivers when the restoration plan was established, can be known but it is not possible to establish the detailed restoration plan. Thus there requires the verification of the assessment method in order to secure the credibility for the assessment method and the improvement of assessment items in order to set up the restoration plan.
As a result of study, there are many differences between the assessment methods. In case of the assessment of the natural characteristic of the rivers, there are the criterion of the assessment items which may incur the confusions for the assessment and in case of the inhabitation and the waterside environment, there are the limitation for the prescription when restoring because of the items not separating the left river side and the right riverside and there are also the inappropriate items for the physical assessment. I therefore suggested the exchange of the assessment items. Also, because of some assessment criterion incurring confusion for the assessment, I improved the criterion of the assessment.
In addition, the common things between the two assessment methods are that the several criterion of the assessment methods may cause the confusion for the assessment and there are great limitation for the assessment of the big rivers.
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