The possible influence of urban surfaces on rainfall development: a sensitivity study in 2D in the meso-g-scale
نویسندگان
چکیده
Urban areas can represent a considerable part of the model domain in meso-scale numerical simulations with typical horizontal domain lengths of 20–200 km. This paper addresses the question of the extent of the influence of urban surfaces on the development of convective precipitation in meso-g-scale numerical models. For this purpose, a spatially variable parameterization scheme for surface sensible heat flux, surface latent heat flux, and roughness is introduced into a meso-scale numerical model. A sensitivity study in 2D is performed to assess the impact of variations of the individual parameters on the development of precipitation. The results indicate that surface conditions should not be neglected and can have considerable influence on convective rainfall. It appears that within a time frame of 4 h it is particularly the sensible heat flux variations that have the most significant impact. q 2000 Elsevier Science B.V. All rights reserved.
منابع مشابه
Effects of impervious surfaces and urban development on runoff generation and flood hazard in the Hajighoshan watershed
Urbanization is a pervasive global trend. The development of residential areas and road network in Hajighoshan watershed (northern Iran) has been observed in the recent several decades. The objective of this study is the quantitative investigation of the effects of impervious surfaces development and urban development on runoff generation and flood hazard. The study of urban area development wa...
متن کاملThe Effect of Mashhad City Development on Its Flooding During 1941- 2016
Impervious surfaces in urban zones, during rainfall, increase the runoff speed and reduce the opportunity for evapotranspiration. This will increase maximum discharge and reduce the time of concentration of flood in urban storm. In this research, the effect of the development of Mashhad on the urban flood has been studied. The EPA SWMM model was used for this study. The studies showed that the ...
متن کاملPreparation of flood sensitivity map using SVM model and the impact of green city development on the increase of flood flow peak and the resulting damage
Aims: The expansion of cities, especially cities that have seen abnormal growth due to economic, social, and political changes, has caused many problems. It has been found that land-use change, especially urbanization, has greatly affected hydrological characteristics. But in most urban designs, flood forecasting is considered through the type of land use (residential, industrial, etc.) and den...
متن کاملGood Governance, (as promoting in decision-making process) and its influence on urban strategic plans
Experiences from urban development plans and assessments of their concrete and tangible results in the past decades indicate lack of adequate success of our urbanization system to responding needs of our citizens. This has resulted in need to find a fundamental solution to transforming the centralized system into decentralized. Recent changes in regard to a change of approach from master plan t...
متن کاملEvaluating the influence of rules and regulations of urban constructions on height plan implementation (Revision of comprehensive plan for Isfahan-district 4)
The fast growth of urbanism in Iran throughout the last half-century resulted in upholding the expansion of cities as well as the promotion of constructions thereof. Of significant problems and challenges Iran’s cities and metropolises ,in particular, are exposed to, is the failure of urban development plans in control of city height and density. A matter which has led to 100% expansion of the ...
متن کامل