Modeling Potential Environmental
Contamination from Abandoned
Uranium Mines
There are more than 500 abandoned uranium mines (AUMs) on the Navajo Nation. The
reclamation
status of many of these mines varies; so too does the extent of contamination. As part
of a
NIH
P-50 award, we developed a proximity based-model of AUM contaminant transport that
accounts
for mobility due to the movement and deposition of mine waste due to wind and water. The
final
model utilizes fuzzy classifiers and a weighted linear combination of multiple
environmental
factors: proximity to AUMs, roads, and downslope drainages, vegetative robustness,
landform
classification, a prevailing wind index, and topographic wind exposure. A paper
detailing
this
work can be found here.
Cove, AZ, Navajo Nation
Livestock Study
Cove is a small community and chapter of the Navajo Nation in northeastern Arizona.
Livestock
in many parts of the Nation are traditionally shepherded in areas that
may be downstream from abandoned uranium mines (AUMs). The mountains surrounding Cove
are
home to
many of these sites and the residents of that community are interested in the associated
potential
risks with consuming meat from livestock. As part of a team consisting of community
members
and researchers at Dine' College, Northern Arizona University, Montana State University
-
Billings,
and UNM, we have developed methods to relate grazing activity with potential exposures
from
plants
and water. Biological samples from these livestock are currently being examined at NAU.
Hydrologic Modeling of Sediment
Deposition and Uranium Mobility
in Cove, AZ, Navajo Nation
Seeking to refine our GIS-MCDA model of potential environmental contamination from
abandoned
uranium
mines (AUMs) on the Navajo Nation, I have began to explore ways to more accurately model
the
processes
of sediment deposition across a distributed watershed. Leveraging the Soil-Water Assessment Tool (SWAT)
and
the SWAT Calibration & Uncertainty Programs
(SWAT-CUP), I have been able to predict total sediment moved in tons/hectare from one
hydrologic response unit (HRU) to others downstream. The second part of
this model is currently underway and uses topological relationships to estimate the
relationship between
magnitude of past mining activity and uranium mobility through surface water and
sediment.
Modeling Agrarian Change
In the Lower Rio Grande
Valley, NM
Ongoing water rights adjudicaiton in the Lower Rio Grande Valley of New Mexico has pitted
water users, farmers, and states against each other. I argue here that the adjudicaiton
process has also incentivized a widespread agricultural transiton to pecan orchards from
other crops that potentially require less water. Using a sequential exploratory research
design, I explore how water governance has precipitated ecological change and the loss of
cultural knowledge, political
change and the exacerbation of inequalities, and legal conflict leading to political battles
downstream of Elephant Butte Dam. Results of this work can be found in a chapter co-authored with Dr. Maria Lane and in my Master's
Thesis.
More Research Descriptions to Come
More Research Descriptions to Come
Copyright 2020, Daniel Beene | darbeene@salud.unm.edu