scholarly journals KARST ROCKY DESERTIFICATION ANALYSIS BASED ON HISTORICAL DISP DATA TAKE TWO REGIONS FOR EXAMPLE

2020 ◽  
Vol XLII-3/W10 ◽  
pp. 871-874
Author(s):  
J. Liu ◽  
G. Q. Zhou ◽  
B. Jia ◽  
T. Yue ◽  
X. Y. Peng
Keyword(s):  
Southwest China ◽  
Temporal Evolution ◽  
Driving Forces ◽  
The United States ◽  
Living Environment ◽  
Karst Area ◽  
Visual Interpretation ◽  
Karst Rocky Desertification ◽  
Rocky Desertification ◽  
Hydrogeological Data

Abstract. Karst rocky desertification (KRD) is used to characterize the processes that transform a karst area covered by vegetation and soil into a rocky landscape almost devoid of soil and vegetation. This situation seriously affects and threatens the living environment and standards of local people, which results in a series of social problems. In view of the importance and harmfulness of KRD, many scholars have studied the spatial and temporal evolution of KRD and its driving forces. In this paper, the Visual Interpretation Marks of Rocky Desertification in Southwest China in 1960s are constructed by using the DISP image of the United States, combined with DEM data and Hydrogeological data. The area of rocky desertification in Guangnan and Funing counties, where rocky desertification is more serious, is about 2457.729 km2. The area of rocky desertification can be used as the basic data for studying the historical changes in southwestern China by researchers.

scholarly journals STUDY ON KARST INFORMATION IDENTIFICATION OF QIANDONGNAN PREFECTURE BASED ON RS AND GIS TECHNOLOGY

2018 ◽  
Vol XLII-3 ◽  
pp. 2121-2125
Author(s):  
M. Yao ◽  
G. Zhou ◽  
W. Wang ◽  
Z. Wu ◽  
Y. Huang ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Karst Area ◽  
Karst Region ◽  
Karst Collapse ◽  
Distribution Map ◽  
Visual Interpretation ◽  
Remote Sensing Images ◽  
Karst Rocky Desertification ◽  
Rocky Desertification ◽  
Karst Areas

Karst area is a pure natural resource base, at the same time, due to the special geological environment; there are droughts and floods alternating with frequent karst collapse, rocky desertification and other resource and environment problems, which seriously restrict the sustainable economic and social development in karst areas. Therefore, this paper identifies and studies the karst, and clarifies the distribution of karst. Provide basic data for the rational development of resources in the karst region and the governance of desertification. Due to the uniqueness of the karst landscape, it can’t be directly recognized and extracted by computer in remote sensing images. Therefore, this paper uses the idea of “RS + DEM” to solve the above problems. this article is based on Landsat-5 TM imagery in 2010 and DEM data, proposes the methods to identify karst information research what is use of slope vector diagram, vegetation distribution map, distribution map of karst rocky desertification and other auxiliary data in combination with the signs for human-computer interaction interpretation, identification and extraction of peak forest, peaks cluster and isolated peaks, and further extraction of karst depression. Experiments show that this method achieves the “RS + DEM” mode through the reasonable combination of remote sensing images and DEM data. It not only effectively extracts karst areas covered with vegetation, but also quickly and accurately locks down the karst area and greatly improves the efficiency and precision of visual interpretation. The accurate interpretation rate of karst information in study area in this paper is 86.73 %.

Relationship between karst rocky desertification and its distance to roadways in a typical karst area of Southwest China

2012 ◽  
Vol 70 (1) ◽  
pp. 295-302 ◽  
Author(s):  
Qiyong Yang ◽  
Zhongcheng Jiang ◽  
Zulu Ma ◽  
Weiqun Luo ◽  
Yunqiu Xie ◽  
...  
Keyword(s):  
Southwest China ◽  
Karst Area ◽  
Karst Rocky Desertification ◽  
Rocky Desertification

Assessing spatial-temporal evolution processes and driving forces of karst rocky desertification

2019 ◽  
pp. 1-19 ◽  
Author(s):  
Fei Chen ◽  
Shijie Wang ◽  
Xiaoyong Bai ◽  
Fang Liu ◽  
Dequan Zhou ◽  
...  
Keyword(s):  
Temporal Evolution ◽  
Driving Forces ◽  
Karst Rocky Desertification ◽  
Rocky Desertification

scholarly journals EXTRACTION OF ROCKY DESERTIFICATION FROM DISP IMAGERY: A CASE STUDY OF LIUPANSHUI, GUIZHOU, CHINA

2017 ◽  
Vol XLII-2/W7 ◽  
pp. 1061-1065
Author(s):  
G. Zhou ◽  
Z. Wu ◽  
W. Wang ◽  
Y. Shi ◽  
G. Mao ◽  
...  
Keyword(s):  
Guizhou Province ◽  
Karst Area ◽  
Visual Interpretation ◽  
Karst Rocky Desertification ◽  
Rocky Desertification ◽  
Correction Model ◽  
Ground Control Points ◽  
Proposed Model ◽  
Typical Type

Karst rocky desertification is a typical type of land degradation in Guizhou Province, China. It causes great ecological and economical implications to the local people. This paper utilized the declassified intelligence satellite photography (DISP) of 1960s to extract the karst rocky desertification area to analyze the early situation of karst rocky desertification in Liupanshui, Guizhou, China. Due to the lack of ground control points and parameters of the satellite, a polynomial orthographic correction model with considering altitude difference correction is proposed for orthorectification of DISP imagery. With the proposed model, the 96 DISP images from four missions are orthorectified. The images are assembled into a seamless image map of the karst area of Guizhou, China. The assembled image map is produced to thematic map of karst rocky desertification by visual interpretation in Liupanshui city. With the assembled image map, extraction of rocky desertification is conducted.

scholarly journals The challenge and future of rocky desertification control in karst areas in southwest China

Solid Earth ◽  
2016 ◽  
Vol 7 (1) ◽  
pp. 83-91 ◽  
Author(s):  
J. Y. Zhang ◽  
M. H. Dai ◽  
L. C. Wang ◽  
C. F. Zeng ◽  
W. C. Su
Keyword(s):  
Southwest China ◽  
Scientific Research ◽  
Lessons Learned ◽  
Dynamic Monitoring ◽  
Chinese Government ◽  
Second Phase ◽  
Karst Rocky Desertification ◽  
Ecological Compensation ◽  
Rocky Desertification ◽  
Desertification Control

Abstract. Karst rocky desertification occurs after vegetation deteriorates as a result of intensive land use, which leads to severe water loss and soil erosion and exposes basement rocks, creating a rocky landscape. Karst rocky desertification is found in humid areas in southwest China, the region most seriously affected by rocky desertification in the world. In order to promote ecological restoration and help peasants out of poverty, the Chinese government carried out the first phase of a rocky desertification control project from 2006 to 2015, which initially contained the expansion of rocky desertification. Currently, the Chinese government is prepared to implement the second phase of the rocky desertification control project, and therefore it is essential to summarise the lessons learned over the last 10 years of the first phase. In this paper, we analyse the driving social and economic factors behind rocky desertification, summarise the scientific research on rocky desertification in the region, and finally identify the main problems facing rocky desertification control. In addition, we put forward several policy suggestions that take into account the perspective of local peasants, scientific research, and China's economic development and urbanisation process. These suggestions include promoting the non-agriculturalization of household livelihoods, improving ecological compensation, strengthening the evaluation of rocky desertification control and dynamic monitoring, and strengthening research on key ecological function recovery technologies and supporting technologies.

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