Modified Palmer Drought Severity Index: Model improvement and application
نویسندگان
چکیده
منابع مشابه
A Self-Calibrating Palmer Drought Severity Index
The Palmer Drought Severity Index (PDSI) has been used for more than 30 years to quantify the long-term drought conditions for a given location and time. However, a common critique of the PDSI is that the behavior of the index at various locations is inconsistent, making spatial comparisons of PDSI values difficult, if not meaningless. A self-calibrating Palmer Drought Severity Index (SC-PDSI) ...
متن کاملAssessing Agricultural Drought in the Anthropocene: A Modified Palmer Drought Severity Index
In the current human-influenced era, drought is initiated by natural and human drivers, and human activities are as integral to drought as meteorological factors. In large irrigated agricultural regions with high levels of human intervention, where the natural farmland soil moisture has usually been changed significantly by high-frequency irrigation, the actual severity of agricultural drought ...
متن کاملDevelopment of a remotely sensing seasonal vegetationbased Palmer Drought Severity Index and its application of global drought monitoring over 19822011
Vegetation effects are currently disregarded in Palmer Drought Severity Index (PDSI), and the sensitivity of PDSI to the choice of potential evaporation (EP) parameterization is often a concern. We developed a revised self-calibrating PDSI model that replaces EP with leaf area index-based total evapotranspiration (ARTS E0). It also included a simple snowmelt module. Using a unique satellite lea...
متن کاملCharacteristics and trends in various forms of the Palmer Drought Severity Index during 1900–2008
[1] The Palmer Drought Severity Index (PDSI) has been widely used to study aridity changes in modern and past climates. Efforts to address its major problems have led to new variants of the PDSI, such as the self‐calibrating PDSI (sc_PDSI) and PDSI using improved formulations for potential evapotranspiration (PE), such as the Penman‐Monteith equation (PE_pm) instead of the Thornthwaite equation...
متن کاملstochastic simulation of drought severity based on palmer index
drought is a gradual phenomenon and cause important changes in water resources, agriculture and so on. due to the stochastic behavior of factors that influence the occurrence and intense of drought, one can consider this phenomenon as a stochastic process. with respect to the importance of predicted drought severity and its vital influence in designing and operating water resources systems, thi...
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ژورنال
عنوان ژورنال: Environment International
سال: 2019
ISSN: 0160-4120
DOI: 10.1016/j.envint.2019.104951