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Why land cover and soil is important than rainfall in flood susceptibility? 

Runoff model
Elevation (ballistics)
Surface runoff
Runoff curve number
Stream power
Best insight from top research papers

Land cover and soil are crucial factors in flood susceptibility compared to rainfall due to their significant influence on flood vulnerability. Studies have shown that land cover changes, particularly built-up areas, have a substantial impact on physical flood vulnerability, with elevation and distance to the river being key criteria influencing vulnerability . Additionally, the type of land cover, such as plantation cover and wetland farming, plays a vital role in either aggravating or mitigating flood risk, affecting river flow rates and flood occurrences . Moreover, soil characteristics, including storage capacity and hydraulic conductivity, significantly affect surface runoff dynamics, with different land uses like forest and grassland showing varying predispositions to excess surface runoff based on soil properties and slope . These findings emphasize the importance of considering land cover and soil conditions alongside rainfall in flood susceptibility assessments.

Answers from top 5 papers

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Papers (5)Insight
Book Chapter•DOI
Mapping Soil Vulnerability to Floods Under Varying Land Use and Climate
Abdallah Alaoui
01 Jan 2017
Land cover and soil properties, such as porosity and hydraulic conductivity, play a crucial role in controlling runoff processes, making them more significant factors in flood susceptibility than rainfall alone.
Open access•Journal Article•DOI
Flood Susceptibility Mapping Using an Analytic Hierarchy Process Model Based on Remote Sensing and GIS Approaches in Akre District, Kurdistan Region, Iraq
Kaiwan Kareemkhan Fatah, Yaseen T. Mustafa, Imaddadin O. Hassan 
30 Sep 2022-Iraqi geological journal
4 Citations
Land cover and soil type are crucial in flood susceptibility as they influence water absorption and runoff, impacting flood severity, whereas rainfall alone does not encompass these localized factors.
Open access•Journal Article•DOI
Flood Vulnerability Evaluation and Prediction Using Multi-temporal Data: A Case in Tangerang, Indonesia
Budi Heru Santosa, Dwi Nowo Martono, Rachmadhi Purwana, Raldi Hendro Koestoer 
01 Nov 2022-International Journal on Advanced Science, Engineering and Information Technology
Land cover and soil are crucial in flood susceptibility due to their significant influence on physical vulnerability, with land cover changes impacting vulnerability by 41% and soil type playing a key role.
Journal Article•DOI
Flood susceptible prediction through the use of geospatial variables and machine learning methods
Navid Mahdizadeh Gharakhanlou, Liliana Perez 
01 Jan 2023-Journal of hydrology
3 Citations
Land cover and soil are more crucial than rainfall in flood susceptibility due to their higher correlation with flooding, as indicated by the Spearman correlation analysis in the study.
Open access•Journal Article•DOI
Impact of land cover, rainfall and topography on flood risk in West Java
Rahmawati Rahayu, Simon A. Mathias, Sim Reaney, Gianni Vesuviano, Rusmawan Suwarman, Agus M. Ramdhan 
02 Dec 2022-Natural Hazards
Land cover and soil type are crucial in flood susceptibility as built land cover increases reporting likelihood, while plantation cover aggravates median river flow rates and wetland farming mitigates extreme events.

Related Questions

What is the effect of soil texture in the susceptibility of an area to floods?4 answersSoil texture plays a significant role in determining the susceptibility of an area to floods. Different soil textures influence water infiltration, runoff dynamics, and soil carbon dynamics, affecting flood potential. Research indicates that soil texture, such as silty clay loam and silty clay, can increase surface runoff and trigger landslides and flash floods. Moreover, soil texture and porosity impact microbial access to substrates, influencing soil respiration and carbon cycling under extreme moisture conditions. Additionally, soil vulnerability to floods is mapped based on flow processes at the plot scale and then scaled up to the catchment scale, with soil texture and structure affecting surface runoff generation. Understanding the effects of soil texture on hydrograph unit characteristics and flood prediction models further emphasizes the importance of soil texture in flood susceptibility.
How does soil moisture affect drought and flood?5 answersSoil moisture plays a crucial role in influencing both drought and flood occurrences. Adequate soil moisture levels are essential for plant growth and can mitigate drought risk by sustaining vegetation during dry periods. Conversely, imbalanced partitioning of rainfall can lead to agricultural droughts or floods, where poor soil moisture management exacerbates the impact of extreme weather events. Studies show that extreme wet and dry events are influenced by precipitation variability, with longer durations for extreme events compared to non-extreme ones. Additionally, the timing of soil moisture anomalies closely aligns with precipitation patterns, highlighting the interconnectedness of soil moisture dynamics with drought and flood events. Proper soil-water management practices can enhance soil moisture retention, reducing drought and flood risks and improving crop yields.
What are the factors that contribute to the intensity of rainfall leading to flooding?4 answersFactors that contribute to the intensity of rainfall leading to flooding include special meteorological conditions matching critical space-time scales of flood generation processes in a catchment. Changes in the flood producing storms, such as modifications to the space-time patterns and rainfall intensities, can also lead to exceptional floods. Climate change is another important factor that increases short-duration high-intensity rainfall and consequent flooding. Different types of rainfall, such as orographic, convective, and frontal rainfalls, generated by various meteorological factors, can also contribute to flooding. Understanding the processes that transform rainfall into discharge is crucial for managing water resources and designing hydraulic structures.
How does ground or soil moisture affect floods?5 answersGround or soil moisture plays a significant role in shaping floods. It has been found that groundwater in the saturated zone, known as baseflow, contributes to river flow and affects the magnitude of annual flooding at various time scales. Flood magnitudes are often more strongly related to variations in antecedent baseflow than antecedent soil moisture and short-term extreme precipitation. Changes in soil moisture conditions have been identified as the dominant mechanism behind observed flood trends, with decreasing soil moisture leading to decreasing flood magnitudes while rainfall extremes have been increasing. Additionally, flood timing is strongly linked to the timing of both rainfall and soil moisture annual maxima, with soil moisture timing having a greater influence on changes in flood timing compared to rainfall timing.
What factors determine the risk of a flood?4 answersFactors that determine the risk of a flood include land-use changes, hydraulic interventions and structures, and climate change. Land-use changes, such as deforestation, urbanization, and soil compaction by agriculture, can increase flood hazards, particularly in small catchments where soil permeability plays a significant role. Hydraulic interventions and structures, such as river training, levees, and dams, can also increase flood hazards, especially for events of medium magnitude. Climate change can contribute to flood hazard increase, with convective storms affecting small catchments and the seasonal interplay of soil moisture, snow, and extreme precipitation influencing regional floods. Understanding the role of these factors is crucial for effective flood risk management and should be communicated to the general public in a nuanced way.
Does soil characteristic influence landslide possibility during flood?2 answersSoil characteristics have a significant influence on the possibility of landslides during floods. The presence of unconsolidated soil materials with wide grain size distributions in landslide dams amplifies the scale of outburst floods, with larger inflow discharges leading to larger peak discharges. Spatial variations in soil type and initial water content can result in the early triggering of landslides with smaller volumes of released mass at the hillslope scale. Rainfall infiltration can cause a decrease in shear strength, triggering surface landslides, especially when combined with the presence of surface cracks and swelling materials. Low permeable soils may experience minor and delayed changes in pore water pressure due to rainfall, but variations in barometric pressure can also influence pore water pressure conditions and trigger landslides. The instability of landslides triggered by earthquakes during rainfall events is influenced by groundwater table position, soil strength properties, and rainfall intensity and accumulation.

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