Filters: Tags: southeastern Montana (X)4 results (64ms)
Sediment Deposition on Floodplains and Point Bars of Powder River in Southeastern Montana from 1979 through 2017
This data release consist of the annual sediment depositional volume at five floodplain and five point bar sites on Powder River in southeastern Montana from 1979 through 2017. These 10 sites are a subgroup of a larger group of cross-sections established in 1975 and 1977 to monitor the channel changes along a 90-kilometer reach of Powder River. In addition to the sediment deposition data, characteristic of the annual peak flood are listed. The data are in 1 Excel files containing worksheets (10) corresponding to each channel cross-section .
ABSTRACT: Ground water, of relatively good quality, occurs though-out southeastern Montana's Tongue River basin and can be procured cheaply and easily. The widespread occurrence of springs and the de velopment of shallow aquifers enables settlement to occur away from perennial streams and allows for extensive grazing of the range. Ground water m the Tongue River basin occurs in five aquifers ranging from shallow alluvium to the extremely deep Madison Group. Coal beds of the Fort Union Formation contain significant quantities of good quality ground water. Extensive strip mining of these coal beds lowers the water level of nearby wells and causes springs to dry up. There are over 1,700 permits for ground water appropriation...
Channel Cross-section Data for Powder River between Moorhead and Broadus, Montana from 1975 to 2018 (ver. 2.0, November 2018)
This data release consist of 40 channel cross sections of Powder River measured from 1975 through 2018 along a 90-kilometer reach from Moorhead to Broadus, Montana. Most channel cross sections were measured annually from 1975 through 1998, intermittently from 1999 through 2012, and then annually from 2013 through 2018. In 1978, after all cross sections had been established, there was a extreme flood with an approximate 50-year recurrence interval. Thus, the data represent the short- and long-term response to an extreme flood. The data are in 40 Excel files (one file for each channel cross section) containing worksheets corresponding to each channel cross-section survey (from 2 to about 42). Worksheets contain...
Coastal Response Type Probabilities with respect to projected sea levels for the Northeastern U.S. from Maine to Virginia for the 2020s, 2030s, 2050s and 2080s (Albers, NAD 83)
The U.S. Geological Survey has been forecasting sea-level rise impacts on the landscape to evaluate where coastal land will be available for future use. The purpose of this project is to develop a spatially explicit, probabilistic model of coastal response for the Northeastern U.S. to a variety of sea-level scenarios that take into account the variable nature of the coast and provides outputs at spatial and temporal scales suitable for decision support. Model results provide predictions of adjusted land elevation ranges (AE) with respect to forecast sea-levels, a likelihood estimate of this outcome (PAE), and a probability of coastal response (CR) characterized as either static or dynamic. The predictions span the...