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Relationship Between Site Coverage and Stormwater Accumulation

Abstract

The study examines the relationship between site coverage and stormwater accumulation, with emphasis on how the proportion of a site occupied by buildings and other constructed surfaces influences the collection and movement of rainwater within developed areas. Site coverage is an important consideration in site planning because increased building and surface coverage can reduce the amount of open ground available for rainfall infiltration. Understanding this relationship is therefore important for improving stormwater management and reducing waterlogging and localized flooding within developed environments. The study will assess the extent of site coverage and its relationship with stormwater accumulation in selected developed areas. Site coverage will be examined through building footprint, paved surfaces, open ground, landscaped areas, and the proportion of the site occupied by impervious surfaces. Stormwater accumulation will be assessed using indicators such as water depth, duration of ponding, frequency of water accumulation, drainage conditions, runoff pathways, and areas prone to waterlogging. Site slope, surface condition, drainage layout, and soil characteristics will also be considered. A descriptive cross-sectional research design will be adopted for the study. Selected sites with varying levels of coverage will be identified using an appropriate sampling technique. Data will be collected through physical measurements, site observation, site mapping, photographic documentation, drainage assessment, and observation of stormwater accumulation following rainfall events where applicable. The collected data will be analyzed using descriptive statistics such as frequency, percentage, mean, and standard deviation, while appropriate comparative and correlation techniques will be applied to determine the relationship between site coverage and stormwater accumulation. The study is expected to reveal variations in stormwater accumulation across sites with different levels of coverage. Areas with higher proportions of buildings and impervious surfaces are expected to experience greater runoff and increased water accumulation, particularly where drainage systems are inadequate or open ground is limited. Sites with lower coverage and greater areas of permeable ground are expected to provide better opportunities for infiltration and reduced surface water accumulation. However, rainfall intensity, soil characteristics, site slope, drainage capacity, surface materials, and maintenance conditions may also influence the observed patterns. The findings will be useful to architects, urban planners, civil engineers, landscape architects, property developers, environmental designers, and planning authorities involved in site development and stormwater management. The study will provide information on the importance of controlling site coverage and maintaining adequate permeable and open areas within developed sites. It may also support better site planning practices that balance building development with effective stormwater infiltration and drainage. The study will conclude by establishing the relationship between site coverage and stormwater accumulation and identifying site conditions associated with increased water accumulation. It is recommended that site planning should provide an appropriate balance between building coverage, paved surfaces, permeable areas, landscaping, and drainage infrastructure. Further studies involving different soil types, rainfall conditions, development patterns, and site characteristics are recommended to provide broader guidance for sustainable site planning and stormwater management.

Keywords: Site coverage, stormwater accumulation, stormwater runoff, residential areas, impervious surfaces, building footprint, surface runoff, waterlogging, site planning, drainage systems, permeable surfaces, rainfall, stormwater management, sustainable site design, environmental planning.