The purpose of this study is to identify the possible environmental implications caused by the irregular expansion of the urban spot in Permanent Preservation Areas of the Apeú, Castanhal and Igarapé do Defunto streams. In this study, a 30-year time scale was considered, from 1987 to 2017. Satellite and radar images made available by INPE and USGS were used for the elaboration NDVI indices. In ...

Mangroves forests, distributed circumtropically in the intertidal region between sea and land in the tropical and subtropical latitudes, provide important ecosystem goods and services. The forests help stabilize shorelines and reduce the devastating impact of natural disasters, such as tsunamis and hurricanes. They also serve as breeding and nursing grounds for marine species and are sources of...

A recent Announcement of Collaborative Opportunity (AOCO) [1], offers an invitation to interested parties to participate in an exercise to validate the new ASTER Global DEM (GDEM). At the time of this abstract submission, the ASTER GDEM has not yet been released but is expected to be available for validation purposes in early 2009 and for general use later in 2009. The validation program is co-...

Initial findings from a national study by the National Water-Quality Assessment (NAWQA) Program of the U.S. Geological Survey (USGS) characterize the occurrence of about 250 anthropogenic organic compounds in source water (defined as water collected at a surface-water intake prior to water treatment) at nine community water systems in nine States in the Nation (fig. 1). The organic compounds an...

Geo-specific road databases are sometimes necessary for driving simulation studies. However, manually creating them is very time consuming. One of the reasons is that a real road can have non-uniform cross sections due to irregular shaped road boundaries. Additionally, in the UCF driving simulator system, the road database format requires identification of repeatable cross sections, which is al...

Describing urban terrain and land use/land cover (LULC) characteristics accurately is an essential element in environmental modeling, assessment and management. Urban terrain and LULC information are especially important in meteorological modeling applications, such as simulations of atmospheric flow over cities, defining surface energy budgets, and fate and transport studies of urban contamina...

The U.S. Geological Survey (USGS) solute transport and biodegradation code BIOMOC was used in conjunction with the USGS universal inverse modeling code UCODE to quantify field-scale hydrocarbon dissolution and biodegradation at the USGS Toxic Substances Hydrology Program crude-oil spill research site located near Bemidji, MN. This inverse modeling effort used the extensive historical data compi...

First posted February 3, 2021 For additional information, contact: Director, Ohio-Kentucky-Indiana Science CenterU.S. Geological Survey6460 Busch Blvd., Suite 100Columbus, OH 43229 The U.S. Survey (USGS) completed hydrologic and hydraulic analyses for selected reaches of the Grand River, Red Cedar Sycamore Creek near Lansing, Michigan, in cooperation with city Lansing. study comprised a 3.1-mil...

First posted April 13, 2023 For additional information, contact: Director, Observing Systems DivisionWater Mission AreaU.S. Geological Survey12201 Sunrise Valley DriveReston, Virginia 20192Contact Pubs Warehouse The Federal Priority Streamgage (FPS) network of the U.S. Survey (USGS), created in 1999 as National Streamflow Information Program, receives Congressional appropriations to support ope...