Estimating The Effects Of Flash Floods On Agriculture Using Depth Damage Curves

Abstract

Pakistan is being regularly hit by different types of floods among them the flash
floods cause devastation to both the lives and properties of people. This study
is designed to assess the flash flood damage to the agriculture sector in the
Watalai khwar flood plain. A mix of both primary and secondary data collection
techniques are used. The most affected villages are ranked and five are selected
based on the proximity with the main channel for the detailed data collection.
The collected data is analyzed to produce depth damage curves, highlighting the
extent of damage to agriculture at different water levels. The study finds that a
significant area of agriculture particularly adjacent to the main water channel is
vulnerable to varying intensities of flash floods. The regression analysis
highlights a positive correlation between the flash flood water depth and the
damage it cause to agriculture in the study area. Effective flood risk
management strategies and policies are essential to be formulated for the
agriculture sector in the area. The authorities must devise ways and means for
the prevention of encroachment towards the main water channel. Moreover both
structural and non structural mitigation measures need to be taken for the better
flood risk management in the area. To prepare the community to cope with flash
floods a comprehensive early warning system is also needed to be installed.