English (United Kingdom)

https://curated-unify.zendy.io/wp-json/zendy-region/v1/featured_content/oa?rat=en

https://curated-unify.zendy.io/wp-json/zendy-region/v1/highlighted_journal/

Global: Zendy Plus annual

Presents the access of premium content as premium feature

Premium Content

Presents the keyphrase highlighting as premium feature

Keyphrase Highlighting

Presents the summarisation as premium feature

Summarisation

Insights

Presents the pdf analysis as premium feature

PDF Analysis

Presents the zaia usage as premium feature

ZAIA

Global: Zendy Tools annual

Global: Zendy Free Plan

Global: Zendy Tools monthly

Global: Zendy Plus monthly

. Flooding is an imminent natural hazard threatening most river deltas, e.g. the Mekong Delta. An appropriate flood management is thus required for asustainable development of the often densely populated regions. Recently, thetraditional event-based hazard control shifted towards a risk managementapproach in many regions, driven by intensive research leading to new legalregulation on flood management. However, a large-scale flood risk assessmentdoes not exist for the Mekong Delta. Particularly, flood risk to paddy ricecultivation, the most important economic activity in the delta, has not beenperformed yet. Therefore, the present study was developed to provide the veryfirst insight into delta-scale flood damages and risks to rice cultivation.The flood hazard was quantified by probabilistic flood hazard maps of thewhole delta using a bivariate extreme value statistics, synthetic floodhydrographs, and a large-scale hydraulic model. The flood risk to paddy ricewas then quantified considering cropping calendars, rice phenology, andharvest times based on a time series of enhanced vegetation index (EVI)derived from MODIS satellite data, and a published rice flood damagefunction. The proposed concept provided flood risk maps to paddy rice for theMekong Delta in terms of expected annual damage. The presented concept can beused as a blueprint for regions facing similar problems due to its genericapproach. Furthermore, the changes in flood risk to paddy rice caused bychanges in land use currently under discussion in the Mekong Delta wereestimated. Two land-use scenarios either intensifying or reducing ricecropping were considered, and the changes in risk were presented in spatiallyexplicit flood risk maps. The basic risk maps could serve as guidance for theauthorities to develop spatially explicit flood management and mitigationplans for the delta. The land-use change risk maps could further be used foradaptive risk management plans and as a basis for a cost–benefit of thediscussed land-use change scenarios. Additionally, the damage and risks mapsmay support the recently initiated agricultural insurance programme inVietnam.

Towards risk-based flood management in highly productive paddy rice cultivation – concept development and application to the Mekong Delta