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Drought Analysis in the Yellow River Basin Based on a Short-Scalar Palmer Drought Severity Index
- Source :
- Water, Volume 10, Issue 11, Water, Vol 10, Iss 11, p 1526 (2018)
- Publication Year :
- 2018
- Publisher :
- Multidisciplinary Digital Publishing Institute, 2018.
-
Abstract
- Focusing on the shortages of moisture estimation and time scale in the self-calibrating Palmer drought severity index (scPDSI), this study proposed a new Palmer variant by introducing the Variable Infiltration Capacity (VIC) model in hydrologic accounting module, and modifying the standardization process to make the index capable for monitoring droughts at short time scales. The performance of the newly generated index was evaluated over the Yellow River Basin (YRB) during 1961&ndash<br />2012. For time scale verification, the standardized precipitation index (SPI), and standardized precipitation evapotranspiration index (SPEI) at a 3-month time scale were employed. Results show that the new Palmer variant is highly correlated with SPI and SPEI, combined with a more stable behavior in drought frequency than original scPDSI. For drought trend detection, this new index is more inclined to reflect comprehensive moisture conditions and reveals a different spatial pattern from SPI and SPEI in winter. Besides, two remote sensing products of soil moisture and vegetation were also employed for comparison. Given their general consistent behaviors in monitoring the spatiotemporal evolution of the 2000 drought, it is suggested that the new Palmer variant is a good indicator for monitoring soil moisture variation and the dynamics of vegetation growth.
- Subjects :
- Index (economics)
lcsh:Hydraulic engineering
010504 meteorology & atmospheric sciences
0208 environmental biotechnology
Geography, Planning and Development
Drainage basin
02 engineering and technology
Aquatic Science
01 natural sciences
Biochemistry
lcsh:Water supply for domestic and industrial purposes
lcsh:TC1-978
Evapotranspiration
palmer drought severity index
Precipitation
drought evaluation
Water content
0105 earth and related environmental sciences
Water Science and Technology
short time scale
geography
lcsh:TD201-500
geography.geographical_feature_category
Moisture
VIC model
Vegetation
020801 environmental engineering
Climatology
Environmental science
Common spatial pattern
Subjects
Details
- Language :
- English
- ISSN :
- 20734441
- Database :
- OpenAIRE
- Journal :
- Water
- Accession number :
- edsair.doi.dedup.....053559adc7ea46430f167250142fc72d
- Full Text :
- https://doi.org/10.3390/w10111526