Help Of DMAP V1.0
Drought Monitor And Prediction
"Drought Monitor And Prediction" is used in:
1- Estimation of meteorological drought indices based on AgMERRA precipitation data and station-observed precipitation data
2- Predictive value of Keetch-Byram Drought Index for cereal yields in a semi-arid environment
How can we run DMAP V1.0 (Drought Monitor And Prediction)?
The DMAP (Drought Monitor And Prediction) software is a comprehensive tool that can calculate 18 drought indices in three different drought types, namely meteorological drought (SPI, PN, DI, RAI, RDI, ZSI, CZI, MCZI, EDI, KBDI, PDSI, PHDI, SPEI), agricultural drought (ETDI, SMDI, ARI), and hydrological drought (SWSI and SDI). For running this software you can follow these steps one by one.
Step1: Input data in Drought Monitor And Prediction
The DMAP tool has 4 tabs, that in this version the point option is active, the region ability will active in the next version (Fig. 1). For starting the software, firstly select the first tab, “Input Excel File” (Fig.2 No. 1). If you want to browse a text file, first you should assign your delimiter (such a space, comma, semicolon, etc.) (Fig.2 No. 2), if you want to browse an excel file it doesn’t need to assign a delimiter. Then you can press “Open File” (Fig.2 No. 3). In Fig.2 No. 4, you can see the open window for selecting the desirable input file. In the open window, you select your file easily, and then click “Open” button.
Fig 1. The main screen of DMAP tool with the main tabs
Fig 2. The input excel file tap and the details
According to the Fig. 3 No. 1, you can see all the sheets that are available in your excel file, so select the proper sheet. In this example we select “Mashhad” sheet that it has several important weather data of Mashhad synoptic station. If your excel file sheet has header of columns so please select the “first Row is header” option (Fig. 3 No. 2), also in “Input Timing” you can select time scale of the input file. In the presented example here, the input data are in daily sale, so we check “Daily” (Fig. 3 No. 3).
Fig 3. Browse your input file and select your sheet
After the desirable sheet was selected then it is the turn of assignments of weather variables. Therefore, as presented in Fig. 4 No.1, you can apply the format of your time scale. If your time data have a format like the 1986, then you should select “YYYY” in the combo box (Fig. 4). In this example for time, there are just the Julian years for each day of year.
Fig 4. Select the format of time.
Then you should assign the header of each column. Attention please, as you see in Fig. 5, in this example the first column was assigned to the “Date”, but there is not any special order for the columns, and this is actually one of the best advantage of the DMAP tool. Also, as presented in Fig.6 assign all the variables, if one or more columns are not necessary to assign, you should remain them with any header.
Fig 5. Assign the variables
As you see in Fig. 6, in this sample input file the second column not necessary for assignment, so the header is “None“(Fig. 6 No. 1) and it doesn’t consider for calculation drought indices. In this sample the first column is “Date”, and others are respectively equal to “None”, “Tmax”, “Rain”, and “T”, that Tmax refers to maximum temperature, Rain for the amount of precipitation, and T refers to mean of temperature. Finally, press the “Load Data” button (Fig. 6 No. 2). Then you will face to a small window “Data loaded”, click it and go to the next step (Fig. 7).
Fig 6. Assign all the variables, without any specific order
Fig 7. Click the “Data Loaded” button
Step2: Drought Indices
In this step please click on the “Drought Indices” tab in the Tab menu. The first panel in this screen is related to the “Calculator” setting. According to the Fig. 8, you can see a small panel that its name is “Timing”. In this panel you can set the start (Fig. 8) and the end (Fig. 9) years.
Fig 8. Select the start year in the “Timing” panel
Fig 9. Select the end year in the “Timing” panel
Then you can select your desirable index from the “Indices” panel, then the “Frequency” panel will highlighted for selecting. According to the selected index in “Indices” panel, the “Frequency” panel has different type. In this example, since the “SPI” index (Fig. 10 No. 1) was selected so the “Frequency” panel has three types, namely Yearly, Seasonally, and Monthly. As you see in Fig. 10, we selected “Yearly” type for calculation of SPI output (Fig. 10 No. 2).
Fig 10. Select the end year in the “Timing” panel
Fig 11. Generate value of the selected index
By clicking “OK” button, the index’s value was calculated if the user wants to see the values, by clicking the “Send to table” button (Fig. 12 No. 1), the user can see the values of selected drought index in the “Output Data” table (Fig. 12 No. 2). If the user wants to export the outputs of the index, he/she can click on the “Export To Excel” button that it is located in the right corner of the screen (Fig. 12 No. 3). By clicking this button, a browse window will open to select a name for the excel output file in a wanted path (Fig. 13). When the file successfully saved, the user can see a small dialog box that will show a message with this content “The file was saved successfully” (Fig. 14).
Fig 12. Send the output of selected index to the table
Fig 13. Select a name and path for the selected index’s outputs in an excel file
Fig 14. Select a name and path for the selected index’s outputs in an excel file
If you want to plot the values of calculated index, you can set some characteristics of the plot settings. You can do this settings in the “Plots” panel as shown in Fig. 15 No.1. In the “Tool” option, first the user can select desirable domain for start and end year. In “Chart Options”, you can type a proper title (Fig. 15 No.2, in this sample we have typed “SPI Mashhad”) for your graph and also if you want your graph has horizontal line in the background you can click the “H-Line” option (Fig. 15 No.3).
Fig 15. Assign some characteristics for Setting of the plot
You have two options for selecting the color of the graph, namely “Grayscale” and “Color plot”. If you don’t select other colors you can just click “Grayscale” option, otherwise click on the combo box, then you can see lots of different colors and as well you can select one of them for the graph (Fig. 16). At last, you can choose your “type of plot” (Fig. 16 No. 1). There are three options, namely “BoxPlot”, “Linear”, and “Columnar” (Fig. 16 No. 1). Finally, after selecting the type of graph you can click on the “Plot” button, and observe the selected graph. The selected graph in this example is “Linear”, so in Fig.17 you can see it, according to this graph since the typed titled was “SPI Mashhad”, so in the presented graph you can see this title. If you want to change it you can easily do it by typing another one in the “Chart Option” panel.
Fig 16. Select the proper color and title for the plot
Fig 17. Plot the desirable graph for the output of index
In Fig. 18 and Fig. 19, we plotted the yearly boxplot of SPI values, and the yearly columnar plot of SPI, respectively by clicking the “Boxplot” and “Columnar” options.
Fig 18. The yearly Boxplot for the output of SPI
Fig 19. The columnar plot for the yearly output of SPI
Step 3:Calculate Severity and Duration
One of the most important characteristic that Agrimetsoft was considered in the DMAP (Drought Monitor and Prediction) software, is calculating severity and duration of drought event. In Fig. 20 and in the right side of screen, you can see a panel with the name of “Severity”. In this panel for calculating the severity and duration of drought in a specific region, first of all you should determine the range of the desirable drought, for example in SPI the specific border of drought classification is less than -0.99. This border can easily find for every index according to the origin paper that was published for each index. You can select one of the two options, namely “More than” or “Less than”. Fig. 21 presented the severity and durations of drought index. In this sample, we have calculated SPI, so the label of “Y” axe is “SPI”. Also, as you can see in Fig. 21at the top the graph, there is a table that.
Fig 20. The severity panel for assign border
Fig 21. The values of severity and duration
Fig 22. The columnar plot for the yearly output of SPI
Fig 23. The Box plot for the seasonally output of SPI