منابع مشابه
USGS directions in MODFLOW development.
Introduction The development and application of ground-water models has been an important component of USGS hydrologic investigations since the early 1970s. During the past 35 years, the USGS has developed a wide range of computer models to simulate saturated and unsaturated subsurface flow, solute transport, and chemical reactions. The most widely used of these programs is the MODFLOW model, w...
متن کاملImplications of the USGS analysis of slope stability at Sulphur Creek
of comments and calculations The slope stability equation and values for material properties recommended by USGS geologist Dr. Raymond Wilson were used to map the stability regime of the four units of THP 1-97-307 HUM and the two units of THP 1-96-413 HUM. When calculations are carried out for conditions without trees, results indicate that each unit includes significant areas that would be exp...
متن کاملUsgs/osu Progress with Digital Camera in Situ Calibration Methods
The United States Geological Survey (USGS) in cooperation with The Ohio State University (OSU) and Calgary University (CU) have developed procedures and software for the efficient calibration of metric quality aerial cameras; both filmand CCD-based sensors. With the advent of the Global Positioning System (GPS), and its efficient use to position the exposure station of the aerial camera, it bec...
متن کاملUsgs and Dlr Topographic Mapping of Comet Borrelly
In the fall of 2001, NASA’s Deep Space 1 (DS1) probe imaged Comet Borrelly during a flyby encounter. Three of the Borrelly images have geometry suitable to photogrammetrically map the nucleus, which form two stereopairs with an expected precision (EP) of ~410 m and ~670 m each. DS1 team members at the USGS and DLR have independently produced digital elevation models (DEMs) of Borrelly. Automati...
متن کاملUSGS Digital Libraries for Coastal and Marine Science
The U.S. Geological Survey (USGS) has developed three related digital libraries providing access to topical and georeferenced information for coastal and marine science: the Marine Realms Information Bank (MRIB) and its two offshoots, the Monterey Bay Science Digital Library and Coastal Change Hazards Digital Library. These three members of the MRIB family run on the same software and share a c...
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ژورنال
عنوان ژورنال: Eos, Transactions American Geophysical Union
سال: 2005
ISSN: 0096-3941
DOI: 10.1029/eo086i025p00239-02