한반도 남부지방 고위평탄면의 지형 발달 및 한국지리 교과서의 고위평탄면 내용 분석

다국어 초록 (Multilingual Abstract)

The high-level planations in the south range rather densely not only in the Taeback Mountains and the Soback Mountains but also in the Youngnam Basin and the Honam District that are relatively lower places. In terms of the height of high-level planations in the south of the Korean Peninsula, those between 300∼600m are 51.57%, those between 800∼1,200m are 14.15% and those over 1,200m are 2.99%. The reason that most high-level planations in the south are between 300∼600m is thought that the high-level planations range in relatively lower regions such as the inland basin of the Youngnam district, which is between the Taeback Mountains and the Soback Mountains, and the Honam district, which is southern part of the Soback Mountains, while the high-level planations in the central part range centering around the high Taeback Mountains. Cholla Namdo, where the Noryung Mountains, the secondary mountains diverging from the Soback Mountains, run along the south and west coasts, has the highest density of high-leve l planations in the western part of the country. For the central part, the west of the line connecting Wonju and Choongju has few high-level planations except the Namhan Mountain Wall. On the contrary, for the southern part, the west has rather many high-level planations. In terms of the difference of height in each of the high-level planations, those below 100m are 60.69%. Those between 200m∼300m are 6.76% and those over 300m are 2.52%. Even for some of high-level planations with the height of 800m or so, the differences of height in the high-level planations reach between 300m∼400m, but generally the higher the difference of height in a high-level planation is, the higher the peak of the high-level planation is.
In the southern part, the ranging density of high-level planations in the west of the Noryung Mountains is very low. So is the ranging density of high-level planations in the east of the Noryung Mountains, the western area of the line connecting Damyang and Kangjin, which is in the Youngsan River basin. In the mouth of the Youngsan River, the development of incised meander is very insignificant as well. As a whole, a high correlation is shown between the areas with high ranging density of high-level planations and the areas with high density of incised meander in the southern part. It is supposed that the incised meanders might develop originally by succeeding to the preceding meanders that had been flowing on the high-level planations after the ground had risen in the course of levelling process since the Mesozoic Era, the Cretaceous period.
Although high-level planations are ranged regardless of the geological features, the range of high-level planations can be variant according to the difference of resistance of each rock to erosion when the high-level planations are the remainders of erosion by dissection. The density is usually high in the areas of metamorphic rock and sedimentary rock. For the areas of granite, high-level planations are found in the area of Bulkuksa granite. high-level planations are very rare in the areas of Taebo granite, such as in the basin of the Youngsan River in the west of the line connecting Damyang and Kangjin and the north of the Noryung Mountains. In addition, the area of sedimentary rock of the Cretaceous period in the basin of Kumho River of the Youngnam district has been lowered due to the long erosion, and as a result, there are many wave-like hills and few high-level planations.
In the sampled areas, the high-level planations are divided by river valleys in the mature stage along the tectolineament and a cross section shows symmetric relation on the axis of Yihyeun tectolineament, which is supposed as a result that, as rising movements began, the rivers flowing on the fault lines eroded downward and dissection happened from the side of the Shinbul Mountain and Chunhwang Mountain to the side of Yihyeun tectolineament. Since then, the high-level planations were dissected secondarily by short dissected valleys that ran at a right angle between the tectolineaments in the direction of the north-northeast ∼ south-southwest parallel to the Yihyeun tectolineament, and as a result, each of the high-level planations forming a line connecting Neungdong Mountain ∼ Shinbul Mountain ∼ Choiseo Mountain and Jaeyak Mountain ∼ Chonhwang Mountain ∼ the right ridge of Hyangrobong is long from south to north and has a saddle part that is a bit low and the high-level planation is divided into smal ler sectors. Seeing the topographical profile of the high-level planation, when the tectolineament passes on the surface of the original soil layer ranging in the area in the past, it was a unified surface, and after the high-level planation was formed by a ground upheaval the rivers developed along the tectolineaments on the surface eroded downward and long geomorphic surfaces from north to south divided by the tectolineaments were formed. Since then, the high-level planations were divided again by short river valleys into several sectors in south and north and became as they are at present.
Examining the contents of geography textbooks in Korea concerning high-level planations, in spite of various kinds of authorized textbooks, they are formed similarly, based on the specification of highschool education of social studies. That is, high-level planations are mentioned in the section of "Natural Environments and Life" to explain geological features of mountains or high-level planations. There are attempts to explain the development process of high-level planations in chronological order. And the regions introduced as high-level planations are usually indisputable. It is occasionally suggested that lava plateaus, which were formed in a different way, are handled without supplementary explanations in the section for high-level planations and it may cause misunderstanding about the origin of high-level planations. It is also concerned that the textbooks use the terms 'eroded plateau' and 'high-level planation' mixedly without clear definition and the learners may think that they are different geog raphical features if they do not know correctly the cause of their development. There are many cases where the geographically significant characteristics of a high-level planation are not revealed enough compared to the circumference because the geographic pictures on the textbooks show the central part of the high-level planation and not its circumference. For example, although the gaps between the contour lines are wide in the part of a high-level planation, it is unrecognizable that the slope is gentle if there is no compared steep areas around the high-level planation. There are also cases where it is unclear if the presented topographical map is for a high-level planation. The pictures on the textbooks are limited in their size and color and they are too small to show the geomorphic characteristics of high-level planation as a whole. In case of the appended topographical map, pictures and maps are the main components of the contents but there are not enough explanation about the pictures and maps.

목차 (Table of Contents)

• I. 서론 = 1
• 1. 문제제기 및 연구목적 = 1
• 2. 기존 연구 및 연구 동향 = 3
• 3. 연구방법 = 6
• II. 고위평탄면의 분포 특징 = 22
• 1. 고위평탄면의 평면적 분포 = 22
• 2. 고위평탄면의 고도별 분포 = 24
• 3. 고위평탄면과 감입곡류와의 관계 = 29
• 4. 고위평탄면과 지질과의 관계 = 32
• III. 표본지역의 고위평탄면 지형 발달 = 35
• IV. 고등학교 한국지리 교과서 고위평탄면 내용분석 = 45
• 1. 교육과정 및 교과서 구성상의 문제점 = 45
• 2. 교과서의 고위평탄면 부분에 대한 분석 = 47
• 3. 교과서 제체상의 문제점과 대안 = 62
• V. 요약 및 결론 = 66
• 참고문헌 = 69
• ABSTRACT = 71