Abstract
Development of the GWF phenomenon in an area takes place with the rising of the groundwater table up to the soil surface. The phenomenon appears in groundwater discharge areas in the forms of soils moistening, swamping, and flooding. In the urban areas of Ukraine it is often developed to a hazardous scale under the impact of a set of various causes and factors, and it results in complex changes in environmental conditions (Jakovlev et al. 2002). Local characteristics of urban development and geology determine the degree of GWF hazard related to an object (area or construction), and the vulnerability of the object to the hazardous impact. Assessment of GWF risk in urban areas might be useful for decision making to ensure geological safety, and during the process of development national and local actions plans (Chebanov and Konoplia 2010). GWF RISK ASSESSMENT A methodology for assessment GWF risk in urban areas based on expert and analytical evaluations (Kuzminand Chebanov 2004) has been applied in Ukraine. When GWF risk is being assessed in relation to an object, then it is necessary to consider: the probability and degree of the hazardous impact, and, in addition, the vulnerability of the object to that impact. The phenomenon of the hazardous impact to the object is mostly external in character and is caused by climate and geology. The vulnerability of the object to the impact is dependent mostly on its own properties and characterizes its ability to withstand the impact injuries. Thus, during the risk assessment it is important to take into consideration the current condition of the object (constructions deterioration). Zoning the risk Techniques for zoning GWF risk (Chebanov and Zadniprovska 2011) includes GIS procedures for combining and overlapping different map layers. Input map layers reflect the spatial distribution of the hazardous processes characteristics and urban development characteristics, which are converted by means of these procedures into output layers of the hazard, vulnerability and risk factors distribution. In this step, models in computational intelligence should be applied together with other techniques. Input characteristics must be given at the points of a base grid of the area (city) map. To perform risk zoning, the following thematic maps (layers) must be analysed:
Highlights
GROUNDWATER FLOODING (GWF)Development of the GWF phenomenon in an area takes place with the rising of the groundwater table up to the soil surface
Input map layers reflect the spatial distribution of the hazardous processes characteristics and urban development characteristics, which are converted by means of these procedures into output layers of the hazard, vulnerability and risk factors distribution
Values of the hazard and vulnerability factors and the risk factor Rf were assessed at the points of a base grid in the city map
Summary
Development of the GWF phenomenon in an area takes place with the rising of the groundwater table up to the soil surface. The phenomenon appears in groundwater discharge areas in the forms of soils moistening, swamping, and flooding. In the urban areas of Ukraine it is often developed to a hazardous scale under the impact of a set of various causes and factors, and it results in complex changes in environmental conditions (Jakovlev et al 2002). Local characteristics of urban development and geology determine the degree of GWF hazard related to an object (area or construction), and the vulnerability of the object to the hazardous impact. Assessment of GWF risk in urban areas might be useful for decision making to ensure geological safety, and during the process of development national and local actions plans (Chebanov and Konoplia 2010)
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a callMore From: Proceedings of the International Association of Hydrological Sciences
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.
