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Tellus A: Dynamic Meteorology and Oceanography Volume 72, 2020 - Issue 1
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Research Article

A novel spatially weighted accumulative procedure for regional drought monitoring

Rizwan Niaz1 Department of Statistics, Quaid-i-Azam University, Islamabad, Pakistan
,
Ijaz Hussain1 Department of Statistics, Quaid-i-Azam University, Islamabad, PakistanCorrespondence[email protected]
,
Zulfiqar Ali1 Department of Statistics, Quaid-i-Azam University, Islamabad, Pakistan
,
Muhammad Faisal2 Faculty of Health Studies, University of Bradford, Bradford, UK
,
Elsayed Elsherbini Elashkar3 Administrative Sciences Department, Community College, King Saud University, Riyadh, Saudi Arabia;4 Applied Statistics Department, Faculty of Commerce, Mansoura University, Mansoura, Egypt
,
Alaa Mohamd Shoukry5 Arriyadh Community College, King Saud University, Riyadh, Saudi Arabia;6 KSA Workers University, Nsar, Egypt
,
Showkat Gani7 College of Business Administration, King Saud University Muzahimiyah, Al-Muzahmiya, Saudi Arabia
&
Fares Fawzi Al-Deek5 Arriyadh Community College, King Saud University, Riyadh, Saudi Arabia
 show all
Pages 1-13 | Received 30 Apr 2020, Accepted 23 Sep 2020, Published online: 10 Nov 2020

Figures & data

Fig. 1. Flow chart of the proposed procedure.

Fig. 1. Flow chart of the proposed procedure.

Fig. 2. Geographical locations of the six selected stations of the Northern area of Pakistan.

Fig. 2. Geographical locations of the six selected stations of the Northern area of Pakistan.

Table 2. An initial classification of drought categories based on the values of the SDI.

Table 4. Steady-state probabilities for seven drought classes at scale-1 on varying indices (SPI, SPEI and SPTI) for selected stations.

Table 1. The climatology characteristics during the period 1971–2017 of six selected stations.

Table 3. BIC of selected probability distributions for SPI, SPEI and SPTI on six stations at scale-1.

Table 5. Correlation coefficients among different stations at scale-1.

Fig. 3. Theoretical vs. empirical histograms of selected distributions for six stations.

Fig. 3. Theoretical vs. empirical histograms of selected distributions for six stations.

Fig. 4. Temporal plots of SPI index for six stations and SWADI at scale-1.

Fig. 4. Temporal plots of SPI index for six stations and SWADI at scale-1.

Fig. 5. Count-plot for drought categories vs steady-state probabilities weights for Astore at scale-1.

Fig. 5. Count-plot for drought categories vs steady-state probabilities weights for Astore at scale-1.

Fig. 6. Count-plot for drought categories vs steady-state weights for Bunji at scale-1.

Fig. 6. Count-plot for drought categories vs steady-state weights for Bunji at scale-1.

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