{"id":10582,"date":"2024-01-30T14:03:41","date_gmt":"2024-01-30T12:03:41","guid":{"rendered":"https:\/\/www.tinosecolodge.gr\/?p=10582"},"modified":"2024-02-01T10:43:08","modified_gmt":"2024-02-01T08:43:08","slug":"water-management-in-tinos-ecolodge","status":"publish","type":"post","link":"https:\/\/www.tinosecolodge.gr\/fr\/news\/water-management-in-tinos-ecolodge\/","title":{"rendered":"Water management in Tinos Ecolodge"},"content":{"rendered":"

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\"Overview<\/div>\n<\/figure>\n

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Water resources at Tinos Ecolodge<\/h4>\n

The initial design concept of ELT, when it was founded in 2014, was to utilize every available
\nwater resource in order to minimize the demand of high quality fresh water from the water
\nnetwork. On the conventional side there is the connection to the public water grid that provides all
\nusages for high quality drinking water such as sinks and showers. On the non conventional side
\nthere is rainwater, river water and treated sewage water. At the ELT we use all four sources of
\nwater, however most of the water needs are covered by non conventional sources. The rainwater is
\ncaptured through a broadly designed harvesting system, which is connected to all hard surfaces
\nlike roofs, stairs and verandas throughout the housing area. The old Cistern with a storage capacity
\nof a 100m3, functions as the central storage from where the water is distributed by pumping
\nthroughout the rainwater network. This utility water network provides all points with water where
\nthe quality can be below drinking water standards. This includes irrigation water, outside tabs for
\ncleaning, general purposes and also serves the toilette flush system. The sewage water which is
\ntransported through a split grey-black water canalization is treated by a CW-vf unit, where the
\neffluent is collected in a cistern for utilization as irrigation water for ornamental non edible plants
\nor can be injected into the toilet flushing network if rainwater reserves run low. The river water is
\nused to supplement the irrigation water for the agricultural production. The table below shows an
\noverview of the different water qualities and the according utilization. In an off-the-grid situation
\nas applying to ELT it is important to be able to react fast to upcoming malfunctions of different sub
\nsystems till the error is solved. This is described in the emergency row where in case of error or
\nshortage different bypasses can be made in order to keep the overall system running. These
\nbypasses become crucial in the case of a malfunction e.g. concerning the vegetable production
\nwhere 2-3 days without water can lead to a total production loss.<\/p>\n

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Current water loops at Tinos Ecolodge<\/h4>\n

The water loop already implemented before the HYDROUSA project is the usage of the treated sewage water
\nfor toilet flushing. This can be described as a full loop where a certain amount of consumed fresh
\nwater is returned to the consumer multiple times (figure 1.6). Due to the evapotranspiration
\nlosses in the CW-vf treatment unit and the piping losses the loop depends on a constant
\nsupplement of fresh water. Through out the time the system is running our experience show a
\ntotal loss of around 15-50% depending on the weather conditions throughout the year.<\/p>\n

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ELT tries to market ecological responsible tourism, this includes an information talk with every new
\narriving customer about the water scarcity and how everybody can contribute positively, through
\nconscious behavior. But in the end it is up to every customer how he deals with water
\nconsumption. So for ELT this loop is important because it turns the customer behavior in both
\ncases into an advantage. If a lot of water is consumed a lot of water is generated for flushing and
\nirrigation, if little is consumed the problem is addressed even better.
\nOf course in a broader perspective the evapotranspiration losses are recaptured in the bigger fresh
\nwater circle of the planet as rainfall. This water is recollected through the rainwater catchment
\nsystem and reused on site. Following this perspective the irrigation of the non edible plants
\ncontribute vastly to the same effect. Here the ecosystem services come into account. When ELT
\nstarted the site was a highly degraded ecosystem in a low productive state, with just a few climax
\nflora species left. The soil was eroded with a minimal to non existing topsoil layer left that could
\nnearly feed highly adopted pioneer species of predominantly grass varieties. This condition was
\nmainly created due to overgrazing from goats and abandoned land management. Through fencing
\nthe site, replanting and enriching the soil functions the habitat is now slowly developing into a
\nproductive maquie to forest ecosystem capable of providing water retention, evapotranspiration,
\nheat reduction etc. This angle allows in our opinion the broader definition of an overall water loop.[\/vc_column_text][vc_column_text]<\/p>\n

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Flow Diagram of the existing and new system<\/h4>\n

The P&Id below (Figure 1.18) shows all water flows within ELT combining the existing system at the lower part of the graphic and the new systems in the upper part. Also, the sensor integration is indicated with the different flow meters and level sensors giving feedback about consumption’s, storage and water flows.
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Projected Data of the existing Water demand<\/h4>\n

The actual demand of water can only be rendered as a simulation where the values are averages of recorded data or assumptions. In reality, it is not accurately predictable how the user will behave in the system and what kind of user will dominate within the whole user group. The design Team of ELT tried to tackle this problem with a consumption range reaching from 80L per person per day (P\/d) to 160L P\/d incrementally. This defined an upper maximum water consumption and a lower minimum, while ELT created its own consumption pattern based on the different water saving strategies and the tourist in mind. This pattern considered a consumption of 106.6L P\/d as realistic value.
\nLooking at the breakdown by use and water source it is possible to provide around 52% of the total demand by utilizing rainwater.
\nWithin the whole water stream only 9%, consisting of the water for cooking and irrigation, is lost within the first usage cycle (indicated in orange). The remaining 91% is transported to the sewage treatment for reuse (indicated in black\/grey).
\nFor ELT this leads to a total water demand of 115.12m within a six month season with a 100% occupation, consisting out of 55.26 fresh water provided by the network and 59.86 from rainwater.
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Projected Data of the existing sewage Water production<\/h4>\n

Through the existing water loop described above also the reclaimed water from the wastewater treatment process contributes to the total water demand. From the overall of 115m water consumed within the lodges, 95.8m finally end up in the treatment facilities; from which 5% is lost due to pipe leaks and around 30% is evapotranspirated in the CW-vf. These assumptions fluctuate throughout time due to degradation of the piping network and weather conditions affecting the water uptake within the wetland. Throughout the season 65% or 68.8m of reclaimed water are available for non-edible plant irrigation or in case of insufficient rainwater for flushing.
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Conclusion<\/h4>\n

In the case of ELT, an average daily consumption of 80L was adopted as the most realistic value. This low consumption would be achieved by combining a mix of factors like very water conscious customers and better overall efficiency of the water saving strategy within ELT. Furthermore, the occupation rate for a new hotel unit is difficult to predict from year to year but reflects heavily on the actual water consumption and respectively to the reclaimed water production. The lack of precise actual data creates an uncertainty and forces the calculations and sizing of the systems generally higher values in order to ensure the safe operation of the system rather than a precise planning according to actual measured values. In the sizing of the new wastewater treatment system IRIDRA and ELT had to assume a value of 80L dark grey water production per PE and day.With the sensor integration this issue will be addressed and more precise data will be generated in the coming years. These long-term data will help following planning processes of NBS for eco- touristic facilities with a focus on low overall water consumption.
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Credits:<\/strong><\/h5>\n

Text : Nicolas Bedau\u00a0 and Marilia Kalouli<\/p>\n

Illustration : Nicolas Bedau<\/p>\n

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\"by-nc-nd\"<\/a><\/figure>\n

[\/vc_column_text][\/vc_column][\/vc_row][vc_column][\/vc_column]<\/p>\n<\/div>","protected":false},"excerpt":{"rendered":"

Water management in Tinos ecolodge, a series of articles based on the HYDROUSA Horizon 2020 European project reports. read more<\/span><\/a><\/p>\n","protected":false},"author":2,"featured_media":10589,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[4,322],"tags":[44,845,204,202],"class_list":["post-10582","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-news","category-uncategorized","tag-grey-water","tag-water-collection","tag-water-management","tag-water-storage"],"acf":[],"_links":{"self":[{"href":"https:\/\/www.tinosecolodge.gr\/fr\/wp-json\/wp\/v2\/posts\/10582","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.tinosecolodge.gr\/fr\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.tinosecolodge.gr\/fr\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.tinosecolodge.gr\/fr\/wp-json\/wp\/v2\/users\/2"}],"replies":[{"embeddable":true,"href":"https:\/\/www.tinosecolodge.gr\/fr\/wp-json\/wp\/v2\/comments?post=10582"}],"version-history":[{"count":16,"href":"https:\/\/www.tinosecolodge.gr\/fr\/wp-json\/wp\/v2\/posts\/10582\/revisions"}],"predecessor-version":[{"id":10691,"href":"https:\/\/www.tinosecolodge.gr\/fr\/wp-json\/wp\/v2\/posts\/10582\/revisions\/10691"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.tinosecolodge.gr\/fr\/wp-json\/wp\/v2\/media\/10589"}],"wp:attachment":[{"href":"https:\/\/www.tinosecolodge.gr\/fr\/wp-json\/wp\/v2\/media?parent=10582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.tinosecolodge.gr\/fr\/wp-json\/wp\/v2\/categories?post=10582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.tinosecolodge.gr\/fr\/wp-json\/wp\/v2\/tags?post=10582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}