Skip to main content

page search

Issuesland coverLandLibrary Resource
There are 2, 239 content items of different types and languages related to land cover on the Land Portal.
Displaying 1177 - 1188 of 2218

Combined analysis of land cover change and NDVI trends in the Northern Eurasian grain belt

Journal Articles & Books
December, 2012
Russia
Eastern Europe

We present an approach to regional environmental monitoring in the Northern Eurasian grain belt combining time series analysis of MODIS normalized difference vegetation index (NDVI) data over the period 2001-2008 and land cover change (LCC) analysis of the 2001 and 2008 MODIS Global Land Cover product (MCD12Q1). NDVI trends were overwhelmingly negative across the grain belt with statistically significant (p[Symbol: see text]0.05) positive trends covering only 1% of the land surface.

Crop classification modelling using remote sensing and environmental data in the Greater Platte River Basin, USA

Journal Articles & Books
December, 2012
United States of America

With an ever expanding population, potential climate variability and an increasing demand for agriculture-based alternative fuels, accurate agricultural land-cover classification for specific crops and their spatial distributions are becoming critical to researchers, policymakers, land managers and farmers. It is important to ensure the sustainability of these and other land uses and to quantify the net impacts that certain management practices have on the environment.

tool for simulation and geo-animation of wildfires with fuel editing and hotspot monitoring capabilities

Journal Articles & Books
December, 2013
Europe

FLogA (Fire Logic Animation) is a set of methods and an interactive, Web-based, user-friendly software tool which allows the user to draw a forest area on the map anywhere in Europe, insert fire ignition points, generate on the fly all input data layers required for a wildfire simulation, and then simulate and animate the behavior of the evolving fireline under different weather conditions. FLogA utilizes only publicly available non-proprietary data, software libraries and Web services. It adopts a distributed, open, service oriented architecture that is easy to maintain and extend.

Spatial Multi-Criteria Analysis Approach for Locating Suitable Sites for Construction of Subsurface Dams in Northern Pakistan

Journal Articles & Books
December, 2014
Pakistan

Pakistan is an agricultural country with an increasing interest for hydropower. Water management problems such as sedimentation and evaporation have been of high concern for surface water reservoirs for many years. Therefore, groundwater storage through subsurface dams could be promising, especially considering the monsoon rainfall and seasonal river flows in Pakistan. The paper aims to develop and test a methodology to locate suitable sites for construction of subsurface dams using spatial multi-criteria analysis (SMCA) in the northern parts of Pakistan.

Monitoring changes in land use land cover of Yamuna riverbed in Delhi: a multi-temporal analysis

Journal Articles & Books
December, 2011

Impact of anthropogenic activities has led to significant changes in riverbeds over a period of time. The objective of the study was to monitor the land use land cover (LULC) of Yamuna riverbed in Delhi and to assess the changes due to natural and anthropogenic activities. The maximum likelihood classification was carried out by using March 1977, April 1999, April 2002 and February 2009 imageries. An overall accuracy of LULC classification of 2009 imagery was around 88.6% based on ground truth data.

Issues in using landscape indicators to assess land changes

Journal Articles & Books
December, 2013

Landscape indicators, when combined with information about environmental conditions (such as habitat potential, biodiversity, carbon and nutrient cycling, and erosion) and socioeconomic forces, can provide insights about changing ecosystem services. They also provide information about opportunities for improving natural resources management. Landscape indicators rely on data regarding land cover, land management and land functionality.

Relationship between Riparian Vegetation and Stream Benthic Communities at Three Spatial Scales

Journal Articles & Books
December, 2006

We examined the influence of riparian vegetation on macroinvertebrate community structure in streams of the Upper Thames River watershed in southwestern Ontario. Thirty-three μ-basins (129–1458 ha) were used to identify land cover variables that influenced stream macroinvertebrates. Micro-basins represented the entire drainage area of study streams and were similar in stream order (first, second) and land cover (agricultural or forest; no urban). We described the structure and composition of riparian vegetation and benthic macroinvertebrate communities at the outflow reach.

spatial–temporal analysis of impacts from human development on the Shih-men Reservoir watershed, Taiwan

Journal Articles & Books
December, 2011
Taiwan

Human activity such as the development of slope land around watersheds has dramatically affected the ecological environment in Taiwan. This situation has been aggravated by heavy precipitation from typhoons in the summertime. The results include serious soil erosion and mass movement in the Shih-men Reservoir watershed.

Good neighbours: distribution of black-tufted marmoset (Callithrix penicillata) in an urban environment

Journal Articles & Books
December, 2015

Context Primates are one of the most charismatic and widely studied vertebrate groups. However, the study of new world primates in green patches within urban areas has been neglected. Such primates have been viewed as a source of human–animal conflict; however, their ecological importance to urban ecosystems and their role in human well being is poorly understood. Aims To increase understanding of both ecological and socioeconomical factors affecting the distribution, density and group sizes of urban marmosets in a large Brazilian city (Belo Horizonte).

Effects of land markets and land management on ecosystem function: A framework for modelling exurban land-change

Journal Articles & Books
December, 2013

This paper presents the conceptual design and application of a new land-change modelling framework that represents geographical, sociological, economic, and ecological aspects of a land system. The framework provides an overarching design that can be extended into specific model implementations to evaluate how policy, land-management preferences, and land-market dynamics affect (and are affected by) land-use and land-cover change patterns and subsequent carbon storage and flux.

Net exchanges of CO₂, CH₄ and N₂O between marshland and the atmosphere in Northeast China as influenced by multiple global environmental changes

Journal Articles & Books
December, 2012

Natural wetland ecosystem plays an important role in global climate change due to its large amounts of stored carbon and nitrogen. The Sanjiang Plain, Northeast China, encompasses large area of natural freshwater marshy wetlands. However, the magnitude and temporal patterns of major greenhouse gases (GHGs: CO₂, CH₄ and N₂O) in this region remain far from certain. Here we used a process-based ecosystem model to examine GHGs fluxes and their underlying mechanisms in the marshland across the Sanjiang Plain over the period 1949–2008.

On using landscape metrics for landscape similarity search

Journal Articles & Books
December, 2016

Landscape similarity search involves finding landscapes from among a large collection that are similar to a query landscape. An example of such collection is a large land cover map subdivided into a grid of smaller local landscapes, a query is a local landscape of interest, and the task is to find other local landscapes within a map which are perceptually similar to the query. Landscape search and the related task of pattern-based regionalization, requires a measure of similarity – a function which quantifies the level of likeness between two landscapes.