Concentrations of suspended solids in lakes can affect the latter’s primary productivity and reflect changes in sediment deposition. Determining the temporal and spatial distribution of suspended solid concentrations has important significance in lake water environmental management; this is particularly urgent for Poyang Lake, the largest freshwater lake in China. In this application, suspended solid concentration inversion models for Poyang Lake were created using a semi-empirical method with regression analysis between continuously measured suspended solid concentration data and multi-band moderate-resolution imaging spectroradiometer images for spring, summer, autumn, and winter from 2009 to 2012. The seasonal distributions of suspended solid concentrations in Poyang Lake from 2000 to 2013 were then obtained using optimal reversal models.
With the WebGIS technology, the application of spatial distribution of the seasonal suspended solids concentration in Poyang Lake, China (2000-2013) has been released. This application shows the measured suspended solid concentrations data in January, February, April, July, October and December from 2000 to 2013. MapServer is used to release Web Map Service (WMS) referring the international specification. The Combination of data and MapBox tiles has been used by OpenLayers to generate the map view. When the app page opened, the satellite image could be visualized as the map service. In the map operation on the right side of the app page, users can select different years and months to view the corresponding data map.
Selecting GIS data operation in the sidebar navigation, users can see the corresponding options (year and month) and click the drop-down arrow to display the year and month lists, including the years from 2000 to 2013, and the months include January, April, July, and October. In the bottom right corner of the app page, users can see application-related documents and information which are classified by label control. The user can choose more to get more readings.
