Skip to main content
USGS - science for a changing world

Coastal Salinity Index for Monitoring Drought


Publication Date
Start Date
End Date


Petkewich, M.D., McCloskey, B.J, Rouen, L.F., and Conrads, P.A., 2019, Coastal Salinity Index for monitoring drought: U.S. Geological Survey data release,


To address the data and information gap for characterizing coastal drought, a coastal salinity index (CSI) was developed using salinity data (Conrads 2016; Conrads and Darby, 2017). The CSI uses an approach similar to the Standardized Precipitation Index (SPI), a readily available drought index that is widely used for monitoring meteorological droughts (McKee and others, 1993). The CSI substitutes total monthly precipitation with monthly mean salinity data to determine the probability of recording a given salinity value in a particular month. The initial investigation demonstrated that the index could be used to delineate short- and long-term drought (saline) and wet (high freshwater inflow) conditions; however, to advance the use [...]


Point of Contact :
Matthew D Petkewich
Originator :
Bryan J McCloskey, Matthew D Petkewich
Metadata Contact :
Matthew D Petkewich
Publisher :
U.S. Geological Survey
USGS Mission Area :
Water Resources
SDC Data Owner :
South Atlantic Water Science Center
Distributor :
U.S. Geological Survey - ScienceBase

Attached Files

Click on title to download individual files attached to this item.

CSI_Station_List.xlsx 20.57 KB 2.78 MB 67.43 MB 30.44 MB 29.65 MB 2.38 MB
North 17.47 MB
Puerto 1.87 MB
South 58.03 MB 4.76 MB
ReadMe_CSI_data_release_structure.txt 4.33 KB
CSI_information_table.pdf 57.35 KB
Original FGDC Metadata

23.07 KB


The data were collected in the field under the (1) U.S. Geological Survey (USGS), (2) National Estuarine Research Reserve System (NERRS), (3) Georgia Coastal Ecosystems Long Term Ecological Research (LTER), and (4) Lower Colorado River Authority (LCRA) stream gaging programs to meet the needs of the collection agency and any cooperating agency for each gage. To advance the use of the Coastal Salinity Index (CSI) as a drought monitoring tool, CSI calculations need to be made available to the scientific community.

Additional Information


Type Scheme Key
DOI doi:10.5066/P9MQLNL2

Item Actions

View Item as ...

Save Item as ...

View Item...