From: Flood vulnerable zones in the rural blocks of Thiruvallur district, South India
S.No | Map Layer | Phenomenon | Need | Source |
---|---|---|---|---|
1. | Rainfall | Rainfall - Runoff | Major cause of flooding | Ajin et al. 2013 |
2. | Drainage Density | Structure of water holding | Major cause of flooding | Setiawan et al. 2017 |
3. | Elevation | Ground surface Topography | Areas of susceptibility | Ouma and Tateishi 2014 |
4. | Slope | Rainfall-Runoff-Erosion | Flood wave velocity | Sumedh et al. 2012 |
5. | Geology | Geology | Result of physical surface processes and the lithology. | Cao et al. 2016 |
6. | Geomorphology | Physical processes on the earth’s surface that produce different landforms | A geomorphic unit is a composite unit in which each feature has specific characteristics. | Mili and Acharjee 2014 |
7. | Land use and landcover | Purpose for which land has been put to use. | Indicates the state of current use. | Ajin et al. 2013 |
8. | Lineaments & Intersection | Zones of structural weakness in the rocks; | Geo Dynamics of flood; | Pareta 2012 |
9. | Zones of Tectonic Subsidence. | Easy movement of water along weak planes. | Geo Dynamics of flood; | Setiawan et al. 2017 |
10. | Soil | Infiltration - Runoff | Efficiency of the soil to acts as a sponge and soak up water | Danumah et al. 2016 |