{"id":20095826,"date":"2022-08-02T12:30:00","date_gmt":"2022-08-02T07:00:00","guid":{"rendered":"https:\/\/www.thethirdpole.net\/?p=95826"},"modified":"2022-08-10T10:44:00","modified_gmt":"2022-08-10T05:14:00","slug":"rising-salinity-threatens-archaeological-sites-bangladesh","status":"publish","type":"post","link":"https:\/\/dialogue.earth\/en\/climate\/rising-salinity-threatens-archaeological-sites-bangladesh\/","title":{"rendered":"Rising salinity threatens \u2018the wealth of the world\u2019 in Bangladesh"},"content":{"rendered":"\n

\u201cThere must be something wrong with the saltwater,\u201d \u200dsays Mohammad Helal Uddin, the khatib<\/em> of the Sixty Dome Mosque, part of the Mosque City of Bagerhat, a Unesco world heritage site on Bangladesh\u2019s southwestern coast. \u201cI have been noticing for six or seven years now that the walls of the mosque are getting damp, containing a green colour.\u201d<\/p>\n\n\n\n

Helal Uddin, who delivers the sermon every Friday and has been in charge of the building for 30 years, is very concerned about changes happening to what is commonly known as Shait Gambuj Mosque. \u201cThe electric lamp is kept on all night to avoid the feeling of damp,\u201d he says. <\/p>\n\n\n\n

The Sixty Dome Mosque is the largest mosque in Bangladesh from the Sultanate period<\/a> (1204-1576). It was built by Khan Jahan Ali, then governor of the Sundarbans<\/a>, the area famous for its mangrove forests, between 1442 and 1459.<\/p>\n\n\n\n

There are 127 archaeological sites in the country\u2019s <\/a>19 coastal districts<\/a>, and at least 50 along the southwestern coast<\/a> have been damaged by climate change, says Afroza Khan<\/a>, regional Khulna director for government agency the Department of Archaeology.<\/p>\n\n\n\n

\"The<\/div>
Green marks on the walls inside the Sixty Dome Mosque \u2013\u00a0or Shait Gambuj Mosque. Electric lamps are kept on throughout the night to try to keep the damp at bay. (Image: S Inzamamul Haque)<\/div><\/div><\/div><\/div>\n\n\n\n

This part of Bangladesh is particularly vulnerable to the impacts of climate change<\/a>, especially salinisation, according to the World Meteorological Organisation<\/a> and the Intergovernmental Panel on Climate Change (IPCC)<\/a>. According to the Bangladesh Soil Resource Development Institute<\/a>, in 1973, 833,000 hectares of coastal land were saline<\/a>. In 2009, this stood at just over a million hectares. This increase in the concentration of salt in the soil and water has been exacerbated by large cyclones<\/a> hitting the country frequently since 2005.<\/p>\n\n\n\n

Map: Where are the saline areas in Bangladesh?<\/span>
\n
\"map<\/div>
Source: Bangladesh Soil Research Development Institute (SRDI)<\/div><\/div><\/div><\/div>\n<\/div><\/div><\/div>\n\n\n\n

\u201cI think salty air with saltwater is responsible for this. I can see this change very clearly,\u201d says Helal Uddin of the Sixty Dome Mosque.<\/p>\n\n\n\n

How salt corrodes Bangladesh\u2019s heritage<\/h2>\n\n\n\n
<\/div>
Recommended<\/span><\/span><\/div><\/a>\n\n\n\n

Large amounts of land in coastal districts, including Bagerhat, have become unsuitable for cultivation<\/a> and the supply of drinking water<\/a> is under threat. But increased salinity has also damaged and destroyed various habitations and structures. Clay bricks and brick chips used as aggregate in concrete are porous, and can be affected by both moisture that penetrates bricks and the salt dissolved in the moisture. When the water evaporates, the salt that is left behind, often appearing as white deposits on walls, can damage the structural integrity of the building.<\/p>\n\n\n\n

\u201cFor the last five or six years, we have been hearing about the effects of salinity on the homes of coastal residents,\u201d Mohammad Arifuzzaman, a senior research engineer at the government-run Housing and Building Research Institute (HBRI)<\/a>, tells the Third Pole. \u201cIn fact, the results of salinity are fairly certain. We are studying how to prevent it and what the consequences will be.\u201d <\/p>\n\n\n\n

Salinity has also affected archaeological sites, including the Sixty Dome Mosque, which is a clay-brick building, says Khandoker Mahfuz ud Darain<\/a>, a professor in the Department of Architecture at Khulna University who is conducting research on the effects of climate change on coastal archaeological sites in Bangladesh. \u201cExcept for the north side of the Sixty Dome Mosque, the other three sides were renovated with specially made bricks a decade ago. Salt has been observed in these reformed places. The new bricks have a higher salt rate than the old ones on the north side,\u201d Darain says.<\/p>\n\n\n\n

\"A<\/div>
The Sixty Dome Mosque in the Mosque City of Bagerhat. Salt residues have formed not only on the clay-brick walls, but also on the domes, experts say. (Image: Jonathan Wilson \/ Alamy)<\/div><\/div><\/div><\/div>\n\n\n\n

<\/a><\/a><\/a><\/a><\/a><\/a><\/a><\/a><\/a>Khan says the newly laid bricks may not have been made to be as salt-tolerant. Salt has not just been forming on the walls, but also on the tops of the domes.<\/a><\/a><\/a><\/a><\/a><\/a><\/a><\/a> This rate of salinisation is occurring in other sites in the Mosque City, Matabbar has noticed. \u201cIn this vicinity, the Nine Dome Mosque<\/a>, Bibi Begni Mosque, Ranbijoypur Mosque and Chunakhola Mosque<\/a> are all in the same condition. The biggest problems are in the Sixty Dome and Chunakhola mosques,\u201d he says.<\/p>\n\n\n\n

Darain has noticed two other trends that he says are the inevitable results of climate change. One is that the general rise in temperature has increased the number of cracks in buildings on archaeological sites. As summer temperatures rise every year, cracks become more common. Because of high rainfall in this region, water is leaking through these cracks. \u201cHow the salinity of the soil can go so high is subject to research. However, excessive rainfall and heat seem to be the causes of cracks,\u201d says Khan.<\/p>\n\n\n\n

<\/a><\/a><\/a><\/a>Proposals and initiatives, but no action yet<\/h2>\n\n\n\n

In 2019, the International Council on Monuments and Sites (ICOMOS)<\/a>, Google Arts & Culture, and CyArk, a US-based organisation that creates digital representations of heritage sites, conducted a workshop<\/a> with the Department of Archaeology. This produced five recommendations regarding the impact of climate change on coastal archaeological sites in Bangladesh.<\/p>\n\n\n\n

The first of these was an emphasis on taking climate change into account when preserving archaeological sites, especially world heritage sites. The other proposals were: to include policies to mitigate the effects of climate change when the Antiquities Act is updated; the inclusion of cultural heritage in policy; the three-dimensional documentation of important archaeological sites; and making the adverse effects of climate change one of the issues the department and its field offices should consider.<\/p>\n\n\n\n

These mosques are not just ours, they are the wealth of the world<\/blockquote>Mohammad Helal Uddin, khatib<\/em> of the Sixty Dome Mosque<\/cite><\/div><\/div>\n\n\n\n

\u201cWe are taking some initiatives. The law has been amended. Work will commence in the next financial year after identifying the important at-risk places in the coastal region,\u201d says Ratan Chandra Pandit, director-general of the Department of Archaeology.<\/p>\n\n\n\n

Archaeologists think that the method of maintaining historic buildings in coastal areas needs to be changed<\/a>, but the money needed to preserve archaeological sites in a climate-friendly manner has not been allocated. As a result, there is no special arrangement in place for the protection of at-risk buildings.<\/p>\n\n\n\n

Bangladesh is taking part in global initiatives<\/a> to protect<\/a> archaeological sites from climate change, but people like Helal Uddin think these initiatives should be implemented sooner rather than later.<\/p>\n\n\n\n

\u201cThese mosques are not just ours, they are the wealth of the world. The government and the world community must pay attention,\u201d he says.<\/p>\n","protected":false},"excerpt":{"rendered":"

Archaeological sites such as those in the Mosque City of Bagerhat on the coast of the country are particularly vulnerable to climate change<\/p>\n","protected":false},"author":20000286,"featured_media":20095852,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[761,50039903],"tags":[519,523,589,50040328],"hashtags":[],"country":[20000116],"class_list":["post-20095826","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-climate","category-water","tag-climate-impacts","tag-conservation","tag-sea-level-rise","tag-water-quality","country-bangladesh"],"acf":[],"yoast_head":"\nSalinity threatens archaeological sites in Bangladesh | Dialogue Earth<\/title>\n<meta name=\"description\" content=\"Archaeological sites such as the Mosque City of Bagerhat on the coast of the country are particularly vulnerable to climate change\" \/>\n<meta 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