Transcription of Drainage - WHO
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Drainage - WHO
48 CHAPTER caused by poor drainageRemoving stormwater and household wastewater (sometimes called sullage ) is an important environmental health intervention for reducingdisease. Poorly drained stormwater forms stagnant pools that provide breed-ing sites for disease vectors. Because of this, some diseases are more commonin the wet season than the dry season. Household wastewater may alsocontain pathogens that can pollute groundwater sources, increasing the riskof diseases such as lymphatic filariasis. Poor Drainage can lead to flooding,resulting in property loss, and people may even be forced to move to escapefloodwaters. Flooding may also damage water supply infrastructure and con-taminate domestic water and public healthIn areas where Drainage and sanitation are poor, water runs over the ground duringrainstorms, picks up faeces and contaminates water sources.
48 CHAPTER 5 Drainage 5.1 Problems caused by poor drainage Removing stormwater and household wastewater (sometimes called “sullage”) is an important environmental health intervention for reducing
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