Methods for Deriving Canada Wide Geo-Spatial Datasets in Support of Environmental Monitoring and Modelling
نویسندگان
چکیده
Satellite remote sensing and numerical modelling are important tools to quantify trends in the environment across Canada. This paper describes methodology and initial results for the production of a new 1-km resolution map of waterbody fraction and 10-km resolution maps of forest cover type (hardwood/softwood) required as input parameters to these approaches. The waterbody fraction map is derived by gridding and aggregating existing national topographic database waterbody entities. The forest cover type map is produced by blending through decision rules a large number of datasets: 1-km resolution land cover based on satellite remote sensing, 1-km digital elevation model, Soil Landscapes of Canada information, and an ecoregion level descriptions of species occurrence. The quality of the water fraction map and forest cover type map is assessed. Applications of both products to national and regional scale mapping and modelling efforts are discussed. Strategies for improving both products are also outlined.
منابع مشابه
sgdm: An R Package for Performing Sparse Generalized Dissimilarity Modelling with Tools for gdm
Global biodiversity change creates a need for standardized monitoring methods. Modelling and mapping spatial patterns of community composition using high-dimensional remotely sensed data requires adapted methods adequate to such datasets. Sparse generalized dissimilarity modelling is designed to deal with high dimensional datasets, such as time series or hyperspectral remote sensing data. In th...
متن کاملAn Integrated Baseline Geodatabase for Facilitating the Environmental Impact Assessment Process: Case Study of Sabalan Geothermal Project, Iran
Baseline data represent one of the important stages of Environmental Impact Assessment (EIA) procedure that describes the existing environment of the study area and surrounding areas in enough detail to allow the environmental impacts of the proposed area to be accurately and adequately assessed, and future changes and effects can be measured. Baseline data may be inaccurate, difficult to obtai...
متن کاملDrought Monitoring Using Climatic Indices and Geostatistic Technique (Case Study: Hossein Abad Plain, Sarbisheh, Iran)
Of the many climatic events that influence the Earth’s environment, drought is perhaps the one that is most linked with desertification. Drought is the consequence of a natural reduction in the amount of precipitation received over an extended period, usually a season or more in length. Drought monitoring is an essential component of drought risk management. It is normally performed using vario...
متن کاملSurface runoff estimation in an upper watershed using geo-spatial based soil conservation service-curve number method
Runoff assessment and estimation is crucial for watershed management as it provides information that is needed to expedite the course of watershed planning and development. The most commonly used model due to its simplicity and versatility in runoff estimation is the soil conservation service curve number developed by the United States Department of Agriculture. The study estimates the surface ...
متن کاملSpatial and Seasonal Trend of Trace Metals and Ecological Risk Assessment along Kanyakumari Coastal Sediments, Southern India
The concentration of selected trace metals (Fe, Cd, Cu, Pb, and Zn) in 30surface sediments were measured using Atomic Absorption Spectrometer to investigatethe spatial and seasonal variations of trace metals along Kanyakumari coast, India. Toassess the environmental risk of trace metals, enrichment factor, geo-accumulation index,pollution load index, and ecological risk index have been calculat...
متن کامل