{"id":14047,"date":"2019-04-23T09:49:09","date_gmt":"2019-04-23T07:49:09","guid":{"rendered":"https:\/\/www.kwrwater.nl\/actueel\/hongkong-groeit-en-ook-de-vraag-naar-betere-afvalwaterinfrastructuur\/"},"modified":"2019-04-26T09:17:27","modified_gmt":"2019-04-26T07:17:27","slug":"as-hong-kong-grows-so-does-demand-for-better-water-infrastructure","status":"publish","type":"post","link":"https:\/\/www.kwrwater.nl\/en\/actueel\/as-hong-kong-grows-so-does-demand-for-better-water-infrastructure\/","title":{"rendered":"As Hong Kong grows, so does demand for better water infrastructure"},"content":{"rendered":"<div class=\"post_intro\">\n<p>From 8-10 April I visited Hong Kong together with Idsart Dijkstra, Water Systems and Technology manager, and Prof. Merle de Kreuk of TU Delft. Merle and I were invited by the Consulate General of the Netherlands. On 9 April, during the \u2018Dutch month\u2019, we took part in the <a href=\"https:\/\/www.dutchchamber.hk\/supported-events\/building-resilience-through-sustainable-urban-water-management\" target=\"_blank\" rel=\"noopener\">Building Resilience through Sustainable Urban Water Management<\/a> event, where we spoke respectively about wastewater treatment and drinking water distribution in the Netherlands. There were over 100 participants from the public services for drinking water, wastewater and the environment, as well as several academics and consultants. It was an interesting meeting, with presentations related to Hong Kong and the Netherlands, as well as panel discussions about the next steps for Hong Kong, and we also met a large number of people.\u00a0 During the dinner offered by the consulate for a select group, we had the opportunity to talk to the key people in the public services and from Hong Kong University of Science and Technology (HKUST).<\/p>\n<\/div>\n<p>The invitation came at an opportune moment, because KWR had already made contact with the city\u2019s water utility (WSD, water supplies department), a local consultant and HKUST. WSD is very interested in our low water loss levels, in our experience with drinking water distribution without mountains to ensure high pressure, and in so-called \u2018smart networks\u2019.<\/p>\n<div class=\"wp-caption aligncenter\" style=\"width: 1024px\"><img loading=\"lazy\" decoding=\"async\" src=\"https:\/\/www.kwrwater.nl\/wp-content\/uploads\/2019\/04\/Hongkong-groep-1024x768.jpg\" alt=\"\" width=\"1024\" height=\"768\" \/><p class=\"wp-caption-text\">The Dutch consul, speakers and panel members at the Water Event on 9 April.<\/p><\/div>\n<p>KWR will be advising the consultant in a recently launched project on a water-quality problem at WSD. HKUST is doing significant basic research into a leak detection technique that could, in the future, be incorporated into Dutch inspection modules. It was great to have direct contact with these people \u2013 rather than only by e-mail or poor Skype connections \u2013 and also to see and talk to them in their home setting.<\/p>\n<h2>Living in Hong Kong<\/h2>\n<p>Hong Kong has a population of 7.4 million people who live on a surface area of 30 by 30 km, of which only 20% can be used for habitation: the remaining surface is either water or mountains. The city has a huge number of residential high-rises which contain very many small apartments. Housing costs are extremely high, so that it is not a simple matter for young people to be able to afford a place of their own.<\/p>\n<h2>Investing in water infrastructure<\/h2>\n<p>Government revenues in Hong Kong rely for the most part on the high land prices, while income tax rates are very low, and drinking water rates do not even cover the operational costs of distributing it. The society functions well and is highly technological. As long as the population continues to grow along with land prices, the possibility of investing in the drinking water and wastewater infrastructures remains. Between 2000 and 2015, for instance, over 3000 km of drinking water mains (40% of the total) were replaced. This initiative cut back water losses from 25 to 15%, and the city aims to reduce this figure even more.<\/p>\n<p><img decoding=\"async\" class=\"aligncenter\" src=\"https:\/\/www.kwrwater.nl\/wp-content\/uploads\/2019\/04\/Hongkong-gebouwen-1024x768.jpg\" \/><\/p>\n<h2>Supply assurance<\/h2>\n<p>Besides the 6000 km of drinking water mains, WSD also manages a network of 2000 km which distributes seawater for toilet flushing. This seawater network has lower supply assurance requirements, since the drinking water network serves as a backup. The drinking water distribution system has a very high level of supply assurance, because the high-rises are actually fed through several routes. WSD is currently dividing the drinking water network into Direct Metered Areas, or DMAs \u2013 today, the process is about at the half-way point to completion, with 2400 DMAs. The drinking water installations in the high-rises, with their various tanks and pumps, are difficult to inspect, so that WSD advises consumers to boil the water before drinking it. Only in the very new high-rises can consumers drink water directly from the tap.<\/p>\n<h2>Drinking water consumption<\/h2>\n<p>We attempted to reconstruct what the supplied drinking water is used for. One-quarter seems to be consumed in households, 15% (or perhaps much more?) is lost, and the remainder is used in commercial activities, with the numerous eateries and restaurants probably accounting for most of this consumption. A clearer picture of the consumption could reveal opportunities for water savings and the use of treated wastewater for drinking water production.<\/p>\n<h2>Big challenge<\/h2>\n<p>The various discussions indicated that the water utility (WSD) every day faces a very big challenge in continuing to meet the requirements. The very busy streets can\u2019t be dug up, and citizens are becoming more vocal. This creates a context in which more and more attention is being directed at risks. We see opportunities for the application of knowledge and experience from the Dutch water sector to the situation in Hong Kong: a number of our tools and models could bridge the gap between theory and practice in the city. In view of Hong Kong\u2019s growing population, this is an important challenge.<\/p>\n<h2>Installing infrastructure differently<\/h2>\n<p>Apart from the improvement of the current infrastructure, there are also possibilities in Hong Kong for the installation of new infrastructure differently. There are big plans to drain another 1700 ha to provide living space for a further one million people in the city. WSD would like to explore how a smart network, with low water losses, could be installed in the area, and how water could be reliably supplied using the pressure from pumps rather than depending on mountain elevation.\u00a0 Perhaps a showcase for Asia?<\/p>\n<p>On the final day of our stay, we checked out the test mains network at HKUST and had initial talks with the consultant. All very informative. In the evening, we paid a visit to an important sponsor of a great deal of research (and even of entire universities): the <a href=\"http:\/\/www.discoverhongkong.com\/au\/promotions\/experience-hongkong\/world-class-events\/hong-kong-horse-racing.html#qaFLruMIuh3Rdhhq.97\" target=\"_blank\" rel=\"noopener\">horse races<\/a>. Naturally, we need to bridge the cultural differences, but we have good prospects for concrete agreements for interesting research in and for this still expanding metropolis.<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>From 8-10 April I visited Hong Kong together with Idsart Dijkstra, Water Systems and Technology manager, and Prof. Merle de Kreuk of TU Delft. Merle and I were invited by the Consulate General of the Netherlands. On 9&#8230;<\/p>\n","protected":false},"author":6,"featured_media":14004,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_relevanssi_hide_post":"","_relevanssi_hide_content":"","_relevanssi_pin_for_all":"","_relevanssi_pin_keywords":"","_relevanssi_unpin_keywords":"","_relevanssi_related_keywords":"","_relevanssi_related_include_ids":"","_relevanssi_related_exclude_ids":"","_relevanssi_related_no_append":"","_relevanssi_related_not_related":"","_relevanssi_related_posts":"","_relevanssi_noindex_reason":"","footnotes":""},"categories":[1412],"tags":[],"class_list":["post-14047","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-column-en","gtag-drinking-water","gtag-water-quality","gtag-distribution-networks","gtag-infrastructure"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.2 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>As Hong Kong grows, so does demand for better water infrastructure - KWR<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/www.kwrwater.nl\/en\/actueel\/as-hong-kong-grows-so-does-demand-for-better-water-infrastructure\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"As Hong Kong grows, so does demand for better water infrastructure - KWR\" \/>\n<meta property=\"og:description\" content=\"From 8-10 April I visited Hong Kong together with Idsart Dijkstra, Water Systems and Technology manager, and Prof. Merle de Kreuk of TU Delft. 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