This paper analyzed the characteristics and influencing factors of population movement in the process of urbanization in Karst regions with the case of Guiyang, China. In general, Karst regions are relatively behind in industrialization and economic development due to geographical reasons. Meanwhile, with the continuous implementation of China's new western development strategy and the rapid progress of urbanization, Guiyang is one of the key development cities and rapid economic growth areas in western China. Therefore, exploring the spatial pattern and influencing factors of the floating population in Guiyang has important implications in studying the urbanization spatial pattern and urbanization process in western China. It also has a very important significance in improving the development imbalance that currently appears in the entire urbanization process of China. Given these circumstances, this paper analyzed the cross section information of the Guiyang region in the three periods of 2000, 2010 and 2020 to obtain the overall Morans'I value of the floating population density distribution by region, and from the perspective of the changing trend of the floating population, the population density distribution phenomenon and the temporal and spatial change characteristics of the floating population in the process of urbanization were analyzed. Finally, through analysis and research on urbanization spatial patterns and processes in Guiyang, factors affecting population movement in the process of urbanization in Karst regions such as Guiyang were analyzed.

Various types of karst topographies are found worldwide. Owing to their global distribution, karst areas have been extensively studied by scientists who investigate new discoveries by linking the characteristics of karst topographies with their own research fields. However, there have been only a few studies on karsts in the Republic of Korea, and little research exists on their hydrogeology. Fragmentary studies have been conducted on the hydrochemical characteristics of groundwater in limestone areas, the causes of high arsenic concentrations in groundwater, and the hydraulic conductivity of limestone areas. Research on hydrogeological characterization and flow mechanisms in these areas has only began recently. Identification and the proper management of available groundwater resources in karst (limestone) areas is essential as their unique geological characteristics render it difficult to construct reservoirs or dams at appropriate scales. We have reviewed prior work on karsts in the Republic of Korea to provide information that supports water resource security in the karst areas, to improve the understanding of the equitable use of water resources, and to identify the best management practices for groundwater resource resilience improvement.

석회암 공동이 발달한 도심지역에서 지하수위 하강에 수반되어 발생한 함몰형 지반침하의 원인 규명 및 공동의 분포 특성 파악을 위하여 시추공을 이용한 전기비저항 토모그래피탐사를 실시하였다. 이때 지하수 수리지질 특성을 파악하기 위하여 시추코아의 비저항 측정, 지하수위 측정 및 수리전도도 해석을 병행하였다. 연구 지역에서의 완만한 지하수위 분포 특성과 0.8-9.3×10-4 cm/s 범위의 수리전도도 분포로 부터 연구지역의 수리지질 특성은 불균질성이 크지 않은 것으로 나타났다. 시추코아를 이용한 전기비저항 측정 결과 연구지역의 석회암은 파쇄가 많은 경우, 변질이 심한 경우 및 신선한 경우로 나눠지며, 전기비저항은 각각 103-161, 218-277 및 597-662 ohm-m의 범위로 나타났다. 시추결과 점토로 충전된 석회암 공동 지점은 토모그래피 탐사자료의 역산 결과 50 ohm-m 이하의 낮은 비저항으로 나타났으며, 각 시추공 간 비저항 영상 단면으로부터 연구지역 전체적으로 지표 하부 심도 약 10-20 m 구간까지 파쇄대 또는 석회암 공동 구간이 분포하는 것으로 나타났다. 또한 석회암 공동의 직경은 약 4-6 m 규모로, 대부분 점토질로 충전된 것으로 판단된다.

From 2002 to 2007, two different systems (shrubs and grasses) were established to raise appropriate ruminants for the purpose of improving biological diversity and fragile ecological environment in the karst-areas through grazing. The objective was to find out a novel way to promote the application of ecological restoration and reconstruction, and the agricultural economy could develop in sustainable way in the karst areas in Guangxi and similar areas in Southwest China.

In the Sosan reclamation land constructed by Hyundai Co,1984, the basic soil test and electric resistivity survey are carried out for the soft grounds around Tee and Kkot islands composed of tuffbreccia, and granite, respectively. The soil of soft grounds are classified as sandy clay(SC) and sandy silt(SM) in the Tee island, and as sandy silt(SM) in Kkot island according to the unified standard classification system. The vertical distribution of the electric resistivity is identified 4 layes with the value 30∼224 Ωm, 3∼59 Ωm, 0.15∼1.5 Ωm, 110∼1280 Ωm(Tee island:112∼122 Ωm, Kkot island:1260∼1283 Ωm), and the layers are interpreted as aeration layer, freshwater saturated layer, seaweater saturated layer, weathered layer, and basement rock respectively. The electric resistivity value decreases with increase of salinity, and pore water and clay mineral content.