水務署2020/21年年報 WSD Annual Report 2020/21

註：長期平均降雨量為 2 431 毫米 Note : Long-term mean rainfall is 2 431 mm 二零一六年至二零二零年全年降雨量 Annual Rainfall 2016 – 2020 毫米 millimetres 3 500 3 000 2 500 2 000 1 500 1 000 500 0 2 395 2 396 3 027 2 572 2 163 年份 Year 2016 2017 2018 2019 2020 年份 Year 2016 2017 2018 2019 2020 二零一六年至二零二零年全年淨集水量 Annual Net Yield 2016 – 2020 百萬立方米 million m 3 272 215 288 304 385 400 300 200 100 0 Local Yield The yield is collected in catchment areas, most of which fall within country parks that are well regulated and protected from contamination. We adopt a multiple barrier approach to control development, regularly conduct inspections and monitor water quality in these areas to ensure water safety. In terms of quantity, the local yield is not stable every year, and can be subject to drastic fluctuations. Coupled with the effect of climate change, we foresee even greater fluctuations in the future. 本地集水 本地集水從集水區收集而來，大部分集水 區均位於受嚴格規管保護，免受污染的郊野 公園內。我們採用多重屏障的原則，在各 集水區監控發展、定期巡查及監測水質的 情況，以確保水質安全。在集水量方面， 每年的本地集水量並不穩定，加上氣候變化 的影響，我們預計未來本地集水量的變動 將會更大。 Dongjiang Water To fill the gap between Hong Kong's local yield and water demand, Dongjiang water is imported as needed, up to the annual supply ceiling stipulated in the supply agreement between Guangdong and Hong Kong. If more local yield is available in a particular year, less Dongjiang water will be imported. This flexible arrangement avoids wasting water resources and saves pumping costs. 東江水 為填補香港本地集水量和用水需求的 缺口，我們在粵港供水協議訂明的每年 供水量上限範圍，按需要輸入東江水。在 本地集水量較多的年份，我們會減少輸入 東江水。這靈活彈性的供水安排既可避免 浪費水資源，又可節省輸水成本。 東江水水管 Dongjiang water mains 22 水務署 二零二零至二一年年報 全面水資源管理 Total Water Management