scholarly journals Estimating historical land use patterns in Amazonia for hydrological studies

2017 ◽  
Vol 8 (4) ◽  
pp. 189-197
Author(s):  
Christiane Cavalcante Leite ◽  
Marcos Heil Costa ◽  
Ranieri Carlos Ferreira de Amorim

The evaluation of the impacts of land-use change on the water resources has been, many times, limited by the knowledge of past land use conditions. Most publications on this field present only a vague description of the past land use, which is usually insufficient for more comprehensive studies. This study presents the first reconstruction of the historical land use patterns in Amazonia, that includes both croplands and pasturelands, for the period 1940-1995. During this period, Amazonia experienced the fastest rates of land use change in the world, growing 4-fold from 193,269 km2 in 1940 to 724,899 km2 in 1995. This reconstruction is based on a merging of satellite imagery and census data, and provides a 5'x5' yearly dataset of land use in three different categories (cropland, natural pastureland and planted pastureland) for Amazonia. This dataset will be an important step towards understanding the impacts of changes in land use on the water resources in Amazonia.

2021 ◽  
Vol 39 (4 supplement) ◽  
pp. 1501-1506
Author(s):  
Pranita JUNGPANICH ◽  
◽  
Katawut WAIYASUSRI ◽  

Land-use change for examining the expansion of built-up and recreation, required effective techniques of spatial assessment, especially in areas with limited space such as Koh Chang island in Thailand which needed to be emphasized. The research objectives were to study land-use patterns in Koh Chang area in Trat province from 2000-2020, and study land-use change, especially the expansion of buildings and recreation area during that period, using geo-informatic technique. The study found that most of Koh Chang is forest land, up to 80% of the island, but the trend is declining. On the other hand, the area that has increased in number is built-up and recreation, which has increased from 7.22 km2 to 18.28 km2 and up to 253.19% in the past 20 years. The efficiency of geo-informatic technology can extract useful information, especially spatial data on land-use change. Therefore, it is known from which areas built-up and recreation areas are transformed in order to bring such information into a spatial database system for supporting decision-making in directing, monitoring and controlling areas for further expansion of tourism business in order not to create an impact on the environment.


1996 ◽  
Vol 18 (1) ◽  
pp. 87-93 ◽  
Author(s):  
P. Sainsbury ◽  
R. Hussey ◽  
J. Ashton ◽  
B. Andrews

Land ◽  
2021 ◽  
Vol 10 (3) ◽  
pp. 286
Author(s):  
Dingrao Feng ◽  
Wenkai Bao ◽  
Meichen Fu ◽  
Min Zhang ◽  
Yiyu Sun

Land use change plays a key role in terrestrial systems and drives the process of ecological pattern change. It is important to investigate the process of land use change, predict land use patterns, and reveal the characteristics of land use dynamics. In this study, we adopted the Markov model and future land use (FLUS) model to predict the future land use conditions in Xi’an city. Furthermore, we investigated the characteristics of land use change from a novel perspective, i.e., via establishment of a complex network model. This model captured the characteristics of the land use system during different periods. The results indicated that urban expansion and cropland loss played an important role in land use pattern change. The future gravity center of urban development moved along the opposite direction to that from 2000 to 2015 in Xi’an city. Although the rate of urban expansion declined in the future, urban expansion remained the primary driver of land use change. The primary urban development directions were east-southeast (ENE), north-northeast (NNE) and west-southwest (WSW) from 1990 to 2000, 2000 to 2015, and 2015 to 2030, respectively. In fact, cropland played a vital role in land use dynamics regarding all land use types, and the stability of the land use system decreased in the future. Our study provides future land use patterns and a novel perspective to better understand land use change.


2007 ◽  
Vol 80 (1-2) ◽  
pp. 111-126 ◽  
Author(s):  
Yu-Pin Lin ◽  
Nien-Ming Hong ◽  
Pei-Jung Wu ◽  
Chen-Fa Wu ◽  
Peter H. Verburg

2016 ◽  
Vol 6 (2) ◽  
pp. 105-118 ◽  
Author(s):  
Rohani Budi Prihatin

Over the past four decades the cities and towns of Indonesia have experienced dramatic population growth. Population growth makes crisis in land use and agriculture that could undermine the health, security, and sustainability of those cities. The purpose of this study is to determine the land use patterns and its changes over time in Bandung City and Yogyakarta City. The research has been done in 2014, by using qualitative method. By considering urbanization and demographic aspect, this study concludes that decision maker in those cities are inconsistent in implementing Regional Development and Spatial Planning. Generally, local city tempted to allocate land use for housing and real estate for short term reasons.


2011 ◽  
Vol 268-270 ◽  
pp. 467-470
Author(s):  
Ming Hu

By analyzing Ansai county utilization current situation and land utilization the past years change condition by the fact that 1989-2005 annual land inquires into a data's to locality , have revealed land utilization middle have problem. Ansai County land use patterns by state policy affects in more, at the same time for the oil industry also has a great influence on the land use type.


2018 ◽  
Vol 10 (7) ◽  
pp. 426 ◽  
Author(s):  
Marcelle A. Urquiza ◽  
Valdinar F. Melo ◽  
Márcio R. Francelino ◽  
Carlos E. G. R. Schaefer ◽  
Eliana De Souza ◽  
...  

The Amazon region has experienced a rapid rate of deforestation and land use change as a result of establishment of agricultural settlements, resulting from public policies designed to promote rural development. We analyzed land use patterns and changes in the central region of Roraima, northern Brazil, testing the hypothesis that the anthropic pressure based on the conversion of natural vegetation (forest ecotone zone and open areas of savanna and campinaranas) on agriculture and pasture, has led to the decline of forest resilience, and has not promoted development in lands converted in agricultural colonization projects, a process exacerbated by practices of burning. Satellite images from between 1984 to 2017, with field-collected data and geoprocessing techniques, allowed interpretation and analysis of seven land-use classes. Agriculturally-based human impacts were greatest in forest areas, with forest loss rates being 6.4 times greater than regeneration rates. The 39.3% reduction in natural non-forest vegetation types exceeded that of forest loss (23.8%). Repeated fires resulted in a 627.1% increase in forest fragmentation in areas heavily impacted by fire. Our study revealed that, over 33 years, deforestation and transitions of land to non-conservation uses did not lead to a system with highly productive agricultural practices, but to extensive impoverished, and degraded subsistence. The main reason was the basic unsuitability of the region´s extremely acidic/dystrophic soils on which settlements have been founded, and the predominance of low-tech, family-based, agriculture and the absence of the required technology for attaining better results.


1973 ◽  
Vol 5 (1) ◽  
pp. 259-264 ◽  
Author(s):  
H. Evan Drummond ◽  
Fred C. White

Recent patterns of rural land use in Georgia have stressed urban aggrandizement and the transformation of a significant portion of the available rural land into forests. The area covered by commercial forests in Georgia has increased 21 percent over the past quarter century to the point where two out of every three acres in Georgia are presently growing tree crops. During the 1958-68 decade the proportion of land in farms in Georgia fell from 31.3 percent to 27.0 percent, representing a withdrawal of approximately 1.6 million acres from farm use. As a partial consequence of this shift in rural land use patterns, the price of farm land over the past ten years has increased more rapidly in Georgia than in any other state but one.


Sign in / Sign up

Export Citation Format

Share Document