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Gaza sewage could cripple
desalination facility 16 September 2005 If the Palestinians go ahead with building a sewage pipe from the Gaza Strip to the sea, this could cripple the new desalination plant near Ashekelon. The plant, planned to desalinate 100 million cubic meters of water annually, is due to be inaugurated at the end of the month. A Water Commission report warns that "if the Ashkelon desalination plant is crippled due to the sewage flowing from the Gaza Strip into the sea, the outcome would be intolerable for Israel's water sector. Any attempt to lay a pipeline to drain sewage into the sea must be physically stopped." The report says that in addition to the damage caused by putting the plant out of business, the sewage would pollute Israel's beaches. Palestinian water commissioner Fadel Kawash said he was aware of Israel's concern. However, he noted that all the Israeli settlements in the West Bank channel all their sewage - some 15 million cubic meters a year - into open areas. A 4,000-square meter sewage pond is sitting near Wadi Hanun in the northern Gaza Strip, and sewage water already flows from there into Israel. There is only one sewage pipe from Gaza City into the sea, near Sheikh Ajlin. Five donor states, including the United States and the European Union, were ready to assist with sewage removal projects in the Gaza Strip. However, they all stopped working on these plans during the conflict years, and only the Swedes have recently returned to the region. Sources in the Water Commission say that one way to pressure the Palestinians to avoid laying the sewage pipe is by means of the donor states.
Has Israeli deterrence become a
farce?
Egypt weighed in on this question loud and clear when Egypt's Ambassador to Israel, Mohamed Assem, assured Israelis in an interview broadcast on Israel Radio's noon news magazine that they should not be concerned about the smuggling of weapons from Egypt to Gaza during the border security hiatus since "there are enough weapons in Gaza as it is." The Palestinians certainly haven't hidden their perception of Israel: Palestinian officials now openly admit that weapons and drugs have poured into Gaza through the open border with Egypt -- but only the drugs are being seized. But, then again, why should we be surprised? The Sharon team is also treating the Jewish State as a farce. None of what has transpired since the retreat has had an impact on policy. If anything, pre-retreat strong talk from the Sharon team with regards to post-retreat security and security arrangements has deteriorated to mumbled vague threats liberally mixed with candid admissions that Israel has no intention to actually take serious and substantial action on the ground if its warnings are not heeded or its requirements are not met. The appointment of Vice Prime Minister Shimon Peres, a man whose cavalier attitude towards Israel's security concerns during the course of Oslo made him the subject of ridicule, to be responsible for negotiating security arrangements at the ports and passages only serves to confirm that Israel's neighbors are right. Since the Peres appointment there are official Palestinian indications that Israel may not even be consulted -- let alone have a hand -- in vital security arrangements. It isn't good for any nation to be perceived as a farce. In Israel's neighborhood it's doubly dangerous.
Spreading of Pollutants from a
Sewage Outfall Along the Gaza Strip
5 Elul 5765 In many parts of the world, including developed countries, sewage from large cities along the coast is disposed of at sea by either dumping the sludge far offshore (usually tens of kilometers) or by discharging the treated wastewater into the sea through an outfall located beyond the breaker zone. In the former case, the assumption is that the sludge will remain cohesive and sink to the bottom in deep water where the environmental impacts will be minimal. In the latter case, it is assumed that the ocean currents will mix and dilute the wastewater with seawater and spread the pollutants over a large area, thereby reducing the concentrations to environmentally acceptable levels. It is important to locate the outfall beyond the breaker zone (typically several kilometers) in order to avoid problems of the pollutants washing up on the immediate shore. By the generic term "pollutants" we refer to dissolved and suspended inorganic and organic material as well as to various bacteria. The latter generally pose the greatest immediate health risk, and high concentrations usually lead to the closing of bathing beaches. The current situation in Gaza City, with more than one million residents, is to discharge the domestic sewage into a holding pool north of the city where the wastewater slowly percolates into the ground. As the population of the Gaza Strip grows, it is clear that an alternative disposal system will have to be established and it is most likely that the choice will be discharge into the sea. Until the present, this has not occurred due to the environmental controls and restrictions enforced by the State of Israel. Upon the Israeli withdrawal from this region, nothing will prevent the Palestinians from switching to the very simple and attractive option of ocean disposal. If this is not properly planned, assessed, and monitored, the dire consequences for Israel will be the equivalent of an ecological time bomb. Based on direct current measurements that were conduced over a period of several years off the coast of Ashkelon and Ashdod, as well as extensive studies of the circulation in the southeastern Mediterranean Sea based on simulations and forecasts with a state-of-the-art ocean circulation model, it has been shown conclusively that throughout the year the predominant direction of flow in this region is along the coast, directed from south to north. The cross-shore component of flow is weaker and fluctuates between onshore and offshore depending upon the depth, the precise current direction, and the wind speed and direction. There is little doubt that any effluents discharged into the sea off the coast of Gaza will spread northward into the territorial waters and the coastal zone of Israel. The potential concentrations and dilution of these effluents as well and the potential environmental impacts cannot be quantitatively assessed without conducting a proper environmental impact study. Nevertheless, we can draw some preliminary qualitative conclusions based on the experience of the Gush Dan sewage outfall, which services the greater Tel Aviv area. This outfall is located 4.5-5 km offshore where the water depth is 38 m. The zone around the outfall has been extensively studied and monitored by scientists from Israel Oceanographic and Limnological Research (IOLR) for many years. Their long-term results clearly show that the seabed and sediments are affected by the effluents at distances of as much as 5 km to the north and 1 km to the south (due to the mainly northward currents). It should be noted that this is for the case of treated effluents. Perhaps a better indication of the potentially dire environmental consequences of an unplanned and unmonitored outfall can be seen in the accident that occurred in February 2003 when the pipeline ruptured and partially untreated wastewater was discharged directly into the sea over a period of several weeks. Satellite images of the sea surface as well as numerical simulations of the circulation at this time clearly showed the north to northeastward spread of the plume, which came ashore and affected the entire coastline of Tel Aviv and the area to the north. The bathing beaches in this area were closed by the Ministry of Health and the Ministry of the Environment for an extended period due to the deterioration of the water quality. Based on this preliminary assessment, there is little doubt that an improperly designed sewage outfall from Gaza will adversely affect the coast of Ashkelon within a very short period of a few weeks or less. Since the outfall would presumably operate continuously, the detrimental effects in Ashkelon will grow with time while the longer term environmental impacts may very well be felt in Ashdod and even further north. Prof. Steve Brenner is a physical oceanographer specializing in numerical simulations of ocean circulation. He has spent the past twenty years studying the circulation of the eastern Mediterranean Sea and the Gulf of Eilat and has coordinated several major environmental impacts studies of the Haifa Bay region. He is currently the head of the Department of Geography and Environment at Bar Ilan University and previously served for 18 years as a senior scientist and the head of the Department of Physical Oceanography at the National Institute of Oceanography in Haifa. He has been the author or co-author of more than 150 scientific papers and reports and has served on various local and international scientific committees and advisory boards.
Bar-Ilan University
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