2020, Vol.9, No.2

Journal of the Association of Korean Geographers 2023 KCI Impact Factor : 1.35

pISSN : 2287-4739 / eISSN : 2733-8991
https://journal.kci.go.kr/JAKG

This study looked at a space from a comprehensive perspective to solve the fragmented understanding of the space in Yangnim-dong, Gwangju. The results of this study are presented as follows. First, the prior research on Yangnim-dong was mostly conducted by modern missionaries. Second, the Yangnim-dong area is a dynamic space that is created and changed “modified” by human life during the Joseon Dynasty, modern times, and today. Third, for the development of Yangnim-dong area, it is necessary to restore the voices of various people of various times, acquire a sense of place through historical geography, and develop local geography textbooks together. This study is meaningful in one methodical attempt to solve the problem of fixed spatial recognition.

This study tried to reveal influences of alluvial landforms on change of urban spatial structure with case studies of Iksan, Chungju, Jinju, Masan and Pohang in Korea. Urbanized area in Iksan has been continuously located on hill to avoid flood, and urbanized area in Chungju began in narrow valley and has been expanded to gently-sloped mountain. Jinju, located on fluvial terrace, has expanded its urbanized area to relatively high flood plain rather than to steeply-sloped mountain. Urbanized area in Masan was located on alluvial fan and has been expanded to coastal plain including reclaimed land. Continuous urban growth in Masan has led urbanized area to occupy almost every gently-sloped region. Pohang has been continued to expand its urbanized area based on delta, while valley and mountain have been occupied by urbanized area since most regions with a low risk of flood on delta were developed.

About tens of meters thick fine sand and silt deposits are observed at the top of the sedimentary logs of hundreds of drilling wells throughout Phoenix metropolitan area, Arizona, USA, situated in north-central Sonoran Desert, and likely deposited after ~ 836ka. A hypothesis to explain the paleo-deposits is that the deposits are a wind-blown deposits derived from the floodplains of nearby rivers developed in response to the aeolian-fluvial interactions. The purpose of this study is to reconstruct paleoenvironment and to understand the processes of transport and deposition of the paleo-deposits using modern analogues. This is accomplished via the identification of the paleo-deposits by comparison with modern source-bordering dune sediments and fluvial sediments using the analyses of grain size distribution and grain shape parameters. Overall, the results of sediment drift potential, grain size distribution and shape analyses provide evidence to support the hypothesis, and the deposition of the paleo-deposits may be related with the change of regional climates. Grain shape parameters may better reflect the mechanism of transport when grains traveled over short distance. Given the advantage, the grain shape analysis may provide a new insight to solve the issue associated with the provenance of Korean loess-like sediments whether it was originated from far-distant the Chinese Loess Plateau and peripheral areas or from nearby floodplains of local river or from exposed fine materials in the Yellow Sea.