Lake Geneva is superb, the quality of its water delights the more than 900,000 people who drink it, and bathing is a popular pastime. But this immaculate beauty is not a reflection of Lake Geneva as it was in the past. And yes, \ud835\uddf6\ud835\uddf9 \ud835\uddf3\ud835\ude02\ud835\ude01 \ud835\ude02\ud835\uddfb \ud835\ude01\ud835\uddf2\ud835\uddfa\ud835\uddfd\ud835\ude00 \ud835\uddfc\ud835\ude02\u0300 \ud835\ude00\ud835\uddf2 \ud835\uddef\ud835\uddee\ud835\uddf6\ud835\uddf4\ud835\uddfb\ud835\uddf2\ud835\uddff \ud835\uddf1\ud835\uddee\ud835\uddfb\ud835\ude00 \ud835\uddf9\ud835\uddf2 \ud835\uddf9\ud835\uddee\ud835\uddf0 \ud835\uddf2\u0301\ud835\ude01\ud835\uddee\ud835\uddf6\ud835\ude01 \ud835\uddf1\ud835\uddee\ud835\uddfb\ud835\uddf4\ud835\uddf2\ud835\uddff\ud835\uddf2\ud835\ude02\ud835\ude05. But what made it such a hostile environment in the 1960s to 1980s?<\/p>\n\n\n\n
Victim of an unprecedented \ud835\uddf2\ud835\ude02\ud835\ude01\ud835\uddff\ud835\uddfc\ud835\uddfd\ud835\uddf5\ud835\uddf6\ud835\ude00\ud835\uddee\ud835\ude01\ud835\uddf6\ud835\uddfc\ud835\uddfb of its waters, the lake frightened most of the region's inhabitants. The stench was foul, the proliferation of algae and the corpses of dead animals drifting in the currents did not inspire confidence and \ud835\ude00\ud835\uddfc\ud835\uddfb \ud835\uddf2\u0301\ud835\ude01\ud835\uddee\ud835\ude01 \ud835\ude00\ud835\uddee\ud835\uddfb\ud835\uddf6\ud835\ude01\ud835\uddee\ud835\uddf6\ud835\uddff\ud835\uddf2 \ud835\uddf2\u0301\ud835\ude01\ud835\uddee\ud835\uddf6\ud835\ude01 \ud835\uddf0\ud835\uddee\ud835\ude01\ud835\uddee\ud835\ude00\ud835\ude01\ud835\uddff\ud835\uddfc\ud835\uddfd\ud835\uddf5\ud835\uddf6\ud835\uddfe\ud835\ude02\ud835\uddf2.<\/p>\n\n\n\n
But what is eutrophication?<\/p>\n\n\n\n
When nutrients (especially phosphorus) accumulate in an aquatic environment accompanied by an increase in temperature and solar radiation, this encourages \ud835\uddf0\ud835\uddff\ud835\uddfc\ud835\uddf6\ud835\ude00\ud835\ude00\ud835\uddee\ud835\uddfb\ud835\uddf0\ud835\uddf2 \ud835\uddf1\ud835\uddf2\ud835\ude00 \ud835\uddfd\ud835\uddf5\ud835\ude06\ud835\ude01\ud835\uddfc\ud835\uddfd\ud835\uddf9\ud835\uddee\ud835\uddfb\ud835\uddf0\ud835\ude01\ud835\uddfc\ud835\uddfb\ud835\ude00 \ud835\uddf2\ud835\ude01 \ud835\uddf1\ud835\uddf2\ud835\ude00 \ud835\uddfd\ud835\uddf9\ud835\uddee\ud835\uddfb\ud835\ude01\ud835\uddf2\ud835\ude00 \ud835\uddee\ud835\uddfe\ud835\ude02\ud835\uddee\ud835\ude01\ud835\uddf6\ud835\uddfe\ud835\ude02\ud835\uddf2\ud835\ude00. High concentrations of these nutrients can lead to rampant growth of these aquatic organisms and \ud835\uddf9\ud835\uddf2\ud835\ude02\ud835\uddff \ud835\uddf1\ud835\uddf2\u0301\ud835\uddf0\ud835\uddfc\ud835\uddfa\ud835\uddfd\ud835\uddfc\ud835\ude00\ud835\uddf6\ud835\ude01\ud835\uddf6\ud835\uddfc\ud835\uddfb \ud835\uddf0\ud835\uddfc\ud835\uddfb\ud835\ude00\ud835\uddfc\ud835\uddfa\ud835\uddfa\ud835\uddf2 \ud835\uddf2\u0301\ud835\uddfb\ud835\uddfc\ud835\uddff\ud835\uddfa\ud835\uddf2\u0301\ud835\uddfa\ud835\uddf2\ud835\uddfb\ud835\ude01 \ud835\uddf1'\ud835\uddfc\ud835\ude05\ud835\ude06\ud835\uddf4\ud835\uddf2\u0300\ud835\uddfb\ud835\uddf2. The cycle continues until the available supply of oxygen is exhausted. As a result, the disappearance of the latter leads to \ud835\uddf9\ud835\uddee \ud835\uddfa\ud835\uddfc\ud835\uddff\ud835\ude01 \ud835\uddf1'\ud835\ude02\ud835\uddfb\ud835\uddf2 \ud835\uddfd\ud835\uddee\ud835\uddff\ud835\ude01\ud835\uddf6\ud835\uddf2 \ud835\uddf1\ud835\uddf2 \ud835\uddf9\ud835\uddee \ud835\uddef\ud835\uddf6\ud835\uddfc\ud835\uddf1\ud835\uddf6\ud835\ude03\ud835\uddf2\ud835\uddff\ud835\ude00\ud835\uddf6\ud835\ude01\ud835\uddf2\u0301 \ud835\uddf1\ud835\ude02 \ud835\uddfa\ud835\uddf6\ud835\uddf9\ud835\uddf6\ud835\uddf2\ud835\ude02, \ud835\uddfd\ud835\uddee\ud835\uddff \ud835\uddee\ud835\ude00\ud835\uddfd\ud835\uddf5\ud835\ude06\ud835\ude05\ud835\uddf6\ud835\uddf2. In addition, increased water turbidity can also encourage the growth of potentially dangerous bacteria.<\/p>\n\n\n\n
\ud835\udddf'\ud835\uddf2\ud835\ude05\ud835\uddfd\ud835\uddf9\ud835\uddfc\ud835\ude00\ud835\uddf6\ud835\uddfc\ud835\uddfb \ud835\uddf1\ud835\uddf2\u0301\ud835\uddfa\ud835\uddfc\ud835\uddf4\ud835\uddff\ud835\uddee\ud835\uddfd\ud835\uddf5\ud835\uddf6\ud835\uddfe\ud835\ude02\ud835\uddf2 \ud835\uddf1\ud835\uddf2 \ud835\udfed\ud835\udff5\ud835\udff1\ud835\udff3 \ud835\uddee\u0300 \ud835\udfed\ud835\udff5\ud835\udff3\ud835\udff3 and the development of fertilisers for agriculture and the use of phosphate detergents were the main causes of the asphyxiation suffered by Lake Geneva during this period. fertilisers for agriculture and the use of phosphate-based detergents were the main causes of the asphyxiation suffered by Lake Geneva during this period. During this period, the concentration of phosphorus increased 9-fold! As the few existing wastewater treatment plants were not always adapted to the volume of water to be treated, most of the polluted water was discharged into the lake, \ud835\ude00\ud835\uddee\ud835\uddfb\ud835\ude00 \ud835\uddee\ud835\ude02\ud835\uddf0\ud835\ude02\ud835\uddfb \ud835\ude01\ud835\uddff\ud835\uddee\ud835\uddf6\ud835\ude01\ud835\uddf2\ud835\uddfa\ud835\uddf2\ud835\uddfb\ud835\ude01 \ud835\uddfd\ud835\uddff\ud835\uddf2\u0301\ud835\uddee\ud835\uddf9\ud835\uddee\ud835\uddef\ud835\uddf9\ud835\uddf2. As a result, many places were not recommended for bathing, or even forbidden!<\/p>\n\n\n\n
After much effort and several long-running battles by stakeholders all around the lake (including the ASL), \ud835\uddf9\ud835\uddf2 \ud835\udddf\ud835\uddf2\u0301\ud835\uddfa\ud835\uddee\ud835\uddfb \ud835\uddee \ud835\uddff\ud835\uddf2\ud835\ude01\ud835\uddff\ud835\uddfc\ud835\ude02\ud835\ude03\ud835\uddf2\u0301 \ud835\uddfd\ud835\uddee\ud835\uddff\ud835\ude01\ud835\uddf6\ud835\uddf2\ud835\uddf9\ud835\uddf9\ud835\uddf2\ud835\uddfa\ud835\uddf2\ud835\uddfb\ud835\ude01 \ud835\ude00\ud835\uddfc\ud835\uddfb \ud835\uddfc\ud835\ude05\ud835\ude06\ud835\uddf4\ud835\uddf2\u0300\ud835\uddfb\ud835\uddf2, \ud835\ude01\ud835\uddfc\ud835\ude02\ud835\ude01 \ud835\uddf2\ud835\uddfb \ud835\uddff\ud835\uddf2\ud835\ude00\ud835\ude01\ud835\uddee\ud835\uddfb\ud835\ude01 \ud835\uddf0\ud835\uddfc\ud835\uddfb\ud835\ude03\ud835\uddee\ud835\uddf9\ud835\uddf2\ud835\ude00\ud835\uddf0\ud835\uddf2\ud835\uddfb\ud835\ude01. So let's take a dip in it, without forgetting that it wasn't always possible!<\/p>\n\n\n\n
Photo: Mus\u00e9e du L\u00e9man <\/p>\n\n\n\n
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\ud835\udc12\ud835\udc28\ud835\udc2e\ud835\udc2b\ud835\udc1c\ud835\udc1e\ud835\udc2c :<\/p>\n\n\n\n
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