Abu Dhabi, UAEThursday 19 July 2018

Sewage lake threatens Jeddah

Saudi Arabia's second-biggest city has been dumping waste into a rising body of water that was created as a stopgap measure 10 years ago.
Sewage trucks being emptied at the musk lake.
Sewage trucks being emptied at the musk lake.

JEDDAH // There are not many lakes in the desert of Saudi Arabia, but in the mountains east of Jeddah flamingos hover around the greenery sprouting at the edge of a large, blue body of water, shimmering in the sun. Yet this lake is not what it seems. The putrid odour belies the truth about this toxic sewage dump next door to Jeddah, Saudi Arabia's second largest city, which has no citywide wastewater system despite the wealth of the world's biggest oil exporter. Musk Lake has been the dumping site of Jedsdah's sewage wastewater for the past 10 years. The lake was created as a stopgap measure to deal with the increasing amounts of wastewater in the growing city. Jeddah's more than three million residents use an estimated 200 litres of water per capita per day, said Tarek Fadaak, the chairman of the Jeddah City Council. The lake was to be used for depositing this water until a functioning sewage system was created, he said. But plans were delayed because the city was not given adequate funding to complete the projects, which take a minimum of 10 years, said Mohammad Shahin, a project manager at the National Water Co, which is responsible for the sewage system project in Jeddah. Since 70 per cent of Jeddah households are not connected to sewerage pipelines, waste water accumulates in underground cesspools and later is transported by lorries to Musk Lake. About 50,000 cubic metres of water are transported to the 2.5 million square-metre lake each day. Only a small percentage of the waste water from the remaining 30 per cent of Jeddah households goes to treatment plants for purification before being dumped in the Red Sea. Most of the waste water that is accumulated through pipes is dumped directly into the sea without purification, said Abdullah al Suhaibany, a co-ordinator and scientific officer at the Reef Chief Foundation, which monitors pollution in the Red Sea to preserve the sea environment. More than 270 pipes were found along the Jeddah coastline that dump waste water into the sea showed a September report, said Abdulhadi al Amari, the general director of GD of Coastal Zone Management at the Presidency of Meteorology and Environment in Jeddah. The damage of such dumping affects the Red Sea waters and coral reefs up to 270 kilometres away from the Jeddah shoreline, Mr al Suhaibany said. Estimated to be an area equivalent to 340 football fields, Musk Lake began to reach dangerous levels and risked spilling over parts of Jeddah. As a result, a concrete dam was built three years ago to hold the water back and prevent spillover into the city. As the sewage system projects failed to materialise, Jeddah continued to use the lake as its main sewage dump and, four months ago, the water rose to the critical level of 12 metres, signalling an alarming call for action to alleviate the pressure on the dam. "In the past few months there have been some leaks at the dam and we informed the municipality of the danger that the dam could break," Mr al Amari said. With winter rains expected in coming weeks, local authorities are concerned that Musk Lake could overflow. Emergency drills have been taking place in certain parts of Jeddah. "This is an issue that has been sitting in the back burner for a long time," Mr Fadaak said. Although official warnings have not been made to the public, some schools in Jeddah, which lie on the route a flood could take, have been instructed to carry out evacuation drills. "They told us that they will take the children up to the roof of the schools in case the flood happens while the children are in school," said a mother who was briefed on the emergency drills at her child's school. The emergency plans put in place by the city's civil defence teams were created for extra precaution, said Mohamed al Tamimi, an adviser to Jeddah municipality, who said for the past three weeks there have been aggressive efforts to increase the safety of the dams by decreasing the lake's water level, which has now gone down to 9.5 metres. With emergency funding of more than 95 million riyals (Dh93m), issued four months ago, the city is diverting part of the lake southward, treating some of it to irrigate land and scrambling to improve wastewater treatment in Jeddah. Combined, the projects currently under construction are expected to help alleviate the pressure on the dam and prevent flooding. "They are not enough," said Mr Fadaak about the emergency projects. "Jeddah needs drastic long-term solutions for the sewage system crisis to be resolved." There is an assumption that the lake's water is infected with toxic materials. Mr Fadaak pointed out that the lorries used to transport toxic waste are the same lorries that deposit waste water into the lake. Speculation that Saudi residents are consuming toxic waste water is rising. According to observers, some farmers use the lake's water to irrigate their vegetables, which they later sell to Jeddah residents. "This is probably done under the radar. I have seen sewage-filled lorries going into farms," said Mr al Suhaibany, who suspects that water from those lorries was used to irrigate the vegetation in some farmlands. In addition, the lagoon environment at Musk Lake has become a fertile rest stop for migrating birds that come from Africa on their way to Asia. "In their excrement they have seeds that started an aquatic life and plant life at the lake," said Richard Bodeker, a landscape architect who has been working in Saudi Arabia for more than 30 years. Mr Bodeker said the birds themselves could be carrying disease beyond the diseases that may be breeding and growing in the water. The accumulation of sewage water in the lake area, as well as in cesspools all over Jeddah, affected the natural underground aquifers, which the country needs to tap into to relieve the water shortage situation in the area. "Some of the sewage leaks into the underground water. This problem has increased with the years and with the rise in Jeddah's population," said Tarik Alireza, a Saudi architect who has been concerned with the sewage crisis for many years. "As a result the underground water situation in Jeddah is horrendous." * The National