نتایج جستجو برای: land cover change

تعداد نتایج: 774514  

2005
Jennifer Bowen John Pitkin Alexia Prskawetz

Land-use change has received less attention than other threats to natural systems and in particular, exurban development is poorly understood despite the fact that it is the fastest growing type of land use in the United States. In this study, land use and cover information was integrated with watershed variables at two different scales resulting in new insights regarding the importance of addr...

Journal: :Remote Sensing 2016
Jean-François Mas Stéphane Couturier Jaime Paneque-Gálvez Margaret Skutsch Azucena Pérez-Vega Miguel Angel Castillo-Santiago Gerardo Bocco

Gebhardt et al. (2014) presented the Monitoring Activity Data for the Mexican REDD+ program (MAD-MEX), an automatic nation-wide land cover monitoring system for the Mexican REDD+ MRV. Though MAD-MEX represents a valuable first effort toward establishing a national reference emissions level for the implementation of REDD+ in Mexico, in this paper, we argue that this land cover system has importa...

Journal: :Remote Sensing 2015
Yuan Yuan Yu Meng Lei Lin Hichem Sahli Anzhi Yue Jingbo Chen Zhongming Zhao Yun-long Kong Dong-xu He

In this paper, we propose a novel method to continuously monitor land cover change using satellite image time series, which can extract comprehensive change information including change time, location, and “from-to” information. This method is based on a hidden Markov model (HMM) trained for each land cover class. Assuming a pixel’s initial class has been obtained, likelihoods of the correspond...

ژورنال: علوم آب و خاک 2009
جلالیان, احمد, خادمی, حسین, مومنی, مسعود, کلباسی, محمود,

The forms and dynamics of soil phosphorus can be greatly affected by land use changes, which often involve changes in vegetation cover, biomass production and nutrient cycling in the ecosystem. Present research evaluates the impact of land use change on the amount of total organic and inorganic P, labile, moderately labile and nonlabile P pools in semiarid soils of central Zagros. Samples were ...

2006
Jinguo YUAN Zheng NIU Wei WANG Xiaoli SHI

North Hebei province lies in the ecotone from agriculture to animal husbandry and forest and is eco-fragile transitional region. Serous land degradation, especially grassland degradation occurs in this area, because of overgrazing and over-reclamation. There are also many disasters, such as drought, dust storm, forest fire, and so on. This area has characteristics of ecological degradation and ...

2009
Yacouba Diallo Guangdao Hu Xingping Wen

Digital change detection is the process that helps in determining the changes associated with land use and land cover properties with reference to geo-registered multi temporal remote sensing data. Puer and Simao, where land use has been greatly affected by recent government policies that aim to balance the need to encourage rural development with ecological stability. These policies include pr...

2012
Dong Jiang Yaohuan Huang Dafang Zhuang Yunqiang Zhu Xinliang Xu Hongyan Ren

Land cover data represent a fundamental data source for various types of scientific research. The classification of land cover based on satellite data is a challenging task, and an efficient classification method is needed. In this study, an automatic scheme is proposed for the classification of land use using multispectral remote sensing images based on change detection and a semi-supervised c...

احمد جلالیان, , حسین خادمی, , مریم یوسفی فرد, ,

Improper use of natural resources, especially soil, causes its degradation and severe soil erosion. Water erosion is an important factor causing soil degradation. Land use change of pasture would result in severe soil erosion mainly due to the reduction of vegetation cover and also surface soil disturbance. The objectives of this study were to estimate the amount of sediment, runoff and nutrien...

The study aimed to determine the impact of sound land use management to the runoff in Kabuntalan, Maguindanao in Tamontaka river basin. This was done through simulation and the comparison of the three land cover scenarios such as 2015 land cover, 2025 projected land cover and desired land use to determine its difference in terms of runoff. Hydrologic Engineering Center-Hydrologic Modeling Syste...

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