9c3e667d-3527-434d-8829-35d1d00688cc eng Streamflow Drought Index (SDI) N/A N/A N/A http://www.droughtmanagement.info/indices/ 2022-02-07T11:04:35 ISO 19115:2003/19139 1.0 http://www.droughtmanagement.info/indices/ Spatial_reference EPSG 7.9 Streamflow Drought Index (SDI) N/A > N/A N/A http://www.droughtmanagement.info/indices/ This index can be used to determine and characterizehydrological drought hazards on a monthly basis. (source WMO and GWP, 2016) Mapping hydrological drought hazard N/A N/A, N/A N/A P0Y0M0DT0H0M0S https://droughtcatalogue.com/thumbnails/Global_Indices.png thumbnail https://droughtcatalogue.com/thumbnails/Global_Indices.png large_thumbnail Type: Indices Type of Drought: Hydrological Drought Application: Mapping hydrological drought hazard Extent: Not relevant Monthly streamflow values and a historical time series for the streamflow gauge. N/A Aggregation period: N/A Spatial scale: N/A eng Not relevant 1 -180 180 -90 90 Not relevant Not relevant Various http://www.droughtmanagement.info/indices/ http://www.droughtmanagement.info/indices/ Not relevant -180 180 -90 90 Mapping hydrological drought hazard N/A N/A 1 Codelist omission 1 Data requirements to use: Monthly streamflow values and a historical time series for the streamflow gauge.; Data used: N/A; Data format: N/A; Data access: N/A; Concise description: Uses monthly streamflow values and the methods of normalization associated with SPI for developing a drought index based upon streamflow data. With an output similar to that of SPI, both wet and dry periods can be investigated, as well as the severity of these occurrences. Streamflow Drought Index (SDI) This index can be used to determine and characterizehydrological drought hazards on a monthly basis. (source WMO and GWP, 2016) Indices Hydrological Mapping hydrological drought hazard N/A Uses monthly streamflow values and the methods of normalization associated with SPI for developing a drought index based upon streamflow data. With an output similar to that of SPI, both wet and dry periods can be investigated, as well as the severity of these occurrences. http://www.droughtmanagement.info/indices/ N/A N/A It is described in the literature with mathematical examples provided. The SPI code is available at http://drought.unl.edu/MonitoringTools/DownloadableSPIProgram.aspx. See http://drinc.ewra.net/ for information on SDI. N/A Nalbantis, I. and G. Tsakiris, 2008: Assessment of hydrological drought revisited. Water Resources Management, 23(5): 881–897. The program is widely available and easy to use. Missing data are allowed, and the longer the streamflow record, the more accurate the results. As with SPI, various timescales can be examined. A single input (streamflow) does not take into account management decisions, and periods of no flow can skew the results. N/A