Julie E. Kiang
Julie Kiang is the Acting Regional Director for the Northeast Region (DOI Region 1) at the U.S. Geological Survey (USGS).
In this position, Julie provides leadership for the activities being conducted at twelve USGS centers and the USGS Chesapeake Bay Program. Of them, six are Water science centers, one Ecological Science Center, one Geoscience Center, one Coastal and Marine Science Center, two Energy and Mineral Science Centers and one Science and Decision Science Center located in the Mid-Atlantic and New England.
Science and Products
Filter Total Items: 32
Topological and canonical kriging for design flood prediction in ungauged catchments: an improvement over a traditional regional regression approach?
In the United States, estimation of flood frequency quantiles at ungauged locations has been largely based on regional regression techniques that relate measurable catchment descriptors to flood quantiles. More recently, spatial interpolation techniques of point data have been shown to be effective for predicting streamflow statistics (i.e., flood flows and low-flow indices) in ungauged...
Authors
Stacey Archfield, Alessio Pugliese, Attilio Castellarin, Jon O. Skøien, Julie E. Kiang
Calculating weighted estimates of peak streamflow statistics
According to the Federal guidelines for flood-frequency estimation, the uncertainty of peak streamflow statistics, such as the 1-percent annual exceedance probability (AEP) flow at a streamgage, can be reduced by combining the at-site estimate with the regional regression estimate to obtain a weighted estimate of the flow statistic. The procedure assumes the estimates are independent...
Authors
Timothy A. Cohn, Charles E. Berenbrock, Julie E. Kiang, Robert R. Mason,
Estimating discharge measurement uncertainty using the interpolated variance estimator
Methods for quantifying the uncertainty in discharge measurements typically identify various sources of uncertainty and then estimate the uncertainty from each of these sources by applying the results of empirical or laboratory studies. If actual measurement conditions are not consistent with those encountered in the empirical or laboratory studies, these methods may give poor estimates...
Authors
T. Cohn, J. Kiang, R. Mason
Causes of systematic over- or underestimation of low streamflows by use of index-streamgage approaches in the United States
Low-flow characteristics can be estimated by multiple linear regressions or the index-streamgage approach. The latter transfers streamflow information from a hydrologically similar, continuously gaged basin ('index streamgage') to one with a very limited streamflow record, but often results in biased estimates. The application of the index-streamgage approach can be generalized into...
Authors
K. Eng, J.E. Kiang, Y.-Y. Chen, D.M. Carlisle, Gregory E. Granato
Water-the Nation's Fundamental Climate Issue A White Paper on the U.S. Geological Survey Role and Capabilities
Of all the potential threats posed by climatic variability and change, those associated with water resources are arguably the most consequential for both society and the environment (Waggoner, 1990). Climatic effects on agriculture, aquatic ecosystems, energy, and industry are strongly influenced by climatic effects on water. Thus, understanding changes in the distribution, quantity and...
Authors
Harry F. Lins, Robert M. Hirsch, Julie E. Kiang
Climate Change and Water Resources Management: A Federal Perspective
Many challenges, including climate change, face the Nation's water managers. The Intergovernmental Panel on Climate Change (IPCC) has provided estimates of how climate may change, but more understanding of the processes driving the changes, the sequences of the changes, and the manifestation of these global changes at different scales could be beneficial. Since the changes will likely...
Authors
Levi D. Brekke, Julie E. Kiang, J. W. Olsen, Roger S. Pulwarty, David A. Raff, D. Phil Turnipseed, Robert Webb, Kathleen D. White
Quantifying uncertainty in discharge measurements: A new approach
The accuracy of discharge measurements using velocity meters and the velocity-area method is typically assessed based on empirical studies that may not correspond to conditions encountered in practice. In this paper, a statistical approach for assessing uncertainty based on interpolated variance estimation (IVE) is introduced. The IVE method quantifies all sources of random uncertainty...
Authors
J.E. Kiang, T.A. Cohn, R.R. Mason
Water loss in the Potomac River basin during droughts
The water loss phenomena in the Washington DC metropoliton area's (WMA) Potomac River water supply basin during droughts was analyzed. Gage errors, permitted withdrawals, evaporation, and transpiration by trees along the river were investigated to account for loss. The Interstate Commission on the Potomac River Basin (ICPRB) calculated potential gage error and examined permits to...
Authors
E.R. Hagen, J.E. Kiang, J.J.A. Dillow
Science and Products
Filter Total Items: 32
Topological and canonical kriging for design flood prediction in ungauged catchments: an improvement over a traditional regional regression approach?
In the United States, estimation of flood frequency quantiles at ungauged locations has been largely based on regional regression techniques that relate measurable catchment descriptors to flood quantiles. More recently, spatial interpolation techniques of point data have been shown to be effective for predicting streamflow statistics (i.e., flood flows and low-flow indices) in ungauged...
Authors
Stacey Archfield, Alessio Pugliese, Attilio Castellarin, Jon O. Skøien, Julie E. Kiang
Calculating weighted estimates of peak streamflow statistics
According to the Federal guidelines for flood-frequency estimation, the uncertainty of peak streamflow statistics, such as the 1-percent annual exceedance probability (AEP) flow at a streamgage, can be reduced by combining the at-site estimate with the regional regression estimate to obtain a weighted estimate of the flow statistic. The procedure assumes the estimates are independent...
Authors
Timothy A. Cohn, Charles E. Berenbrock, Julie E. Kiang, Robert R. Mason,
Estimating discharge measurement uncertainty using the interpolated variance estimator
Methods for quantifying the uncertainty in discharge measurements typically identify various sources of uncertainty and then estimate the uncertainty from each of these sources by applying the results of empirical or laboratory studies. If actual measurement conditions are not consistent with those encountered in the empirical or laboratory studies, these methods may give poor estimates...
Authors
T. Cohn, J. Kiang, R. Mason
Causes of systematic over- or underestimation of low streamflows by use of index-streamgage approaches in the United States
Low-flow characteristics can be estimated by multiple linear regressions or the index-streamgage approach. The latter transfers streamflow information from a hydrologically similar, continuously gaged basin ('index streamgage') to one with a very limited streamflow record, but often results in biased estimates. The application of the index-streamgage approach can be generalized into...
Authors
K. Eng, J.E. Kiang, Y.-Y. Chen, D.M. Carlisle, Gregory E. Granato
Water-the Nation's Fundamental Climate Issue A White Paper on the U.S. Geological Survey Role and Capabilities
Of all the potential threats posed by climatic variability and change, those associated with water resources are arguably the most consequential for both society and the environment (Waggoner, 1990). Climatic effects on agriculture, aquatic ecosystems, energy, and industry are strongly influenced by climatic effects on water. Thus, understanding changes in the distribution, quantity and...
Authors
Harry F. Lins, Robert M. Hirsch, Julie E. Kiang
Climate Change and Water Resources Management: A Federal Perspective
Many challenges, including climate change, face the Nation's water managers. The Intergovernmental Panel on Climate Change (IPCC) has provided estimates of how climate may change, but more understanding of the processes driving the changes, the sequences of the changes, and the manifestation of these global changes at different scales could be beneficial. Since the changes will likely...
Authors
Levi D. Brekke, Julie E. Kiang, J. W. Olsen, Roger S. Pulwarty, David A. Raff, D. Phil Turnipseed, Robert Webb, Kathleen D. White
Quantifying uncertainty in discharge measurements: A new approach
The accuracy of discharge measurements using velocity meters and the velocity-area method is typically assessed based on empirical studies that may not correspond to conditions encountered in practice. In this paper, a statistical approach for assessing uncertainty based on interpolated variance estimation (IVE) is introduced. The IVE method quantifies all sources of random uncertainty...
Authors
J.E. Kiang, T.A. Cohn, R.R. Mason
Water loss in the Potomac River basin during droughts
The water loss phenomena in the Washington DC metropoliton area's (WMA) Potomac River water supply basin during droughts was analyzed. Gage errors, permitted withdrawals, evaporation, and transpiration by trees along the river were investigated to account for loss. The Interstate Commission on the Potomac River Basin (ICPRB) calculated potential gage error and examined permits to...
Authors
E.R. Hagen, J.E. Kiang, J.J.A. Dillow