Читать книгу Pollutants and Water Management - Группа авторов - Страница 43

The hydrological regime of the wetland is highly variable throughout the year. Therefore, a contour line map of water availability in different months, i.e. October, December, March, and June during the study period was prepared and depicted in Figure 2.7. The average water spread was recorded to the maximum extent in October. Later, it started decreasing in December, followed by June, and the minimum water spread was in March. This is an indication of un‐uniform water availability and a pattern of siltation across the wetland. It also clarifies that in the lower stretch of this wetland, the pattern of siltation is more frequent, followed by the upper and middle stretches. The most frequent pattern of silt deposition in the lower stretch could be due to its existence toward the outlet channel of the wetland, which is not appropriately managed, and the runoffs from the whole catchment are drained to this part.

Figure 2.7 Contours lines based on water availability in different months in the Kanwar wetland by using Landsat 8 data from 2014 to 2017 for October, December, March, and June.