Mass death of fish in the reservoir allegedly caused water pollution leading to a reduction of dissolved oxygen (Dissolved Oxygen / DO).
Pollution of the waters of the reservoir is not only due to the existence of floating net cages exceed the carrying capacity of the environment, but because it is a downstream reservoir watershed that has been contaminated by sewage.
Floating net cage fish farmers (KJA) in waters Cirata, West Java, helm obtain weather forecast information hostile conditions the next few weeks. The Meteorology, Climatology and Geophysics (BMKG) predicts the peak of the rainy season occurs early January to February 2015.
Learning from the experience of previous years, entered the peak of the rainy season means it will appear threat of mass death of fish (KMI) in waters Cirata. Signs before the events of the IMA, usually cloudy sky for a few days with the wind.
Therefore, these days most of the farmers did not dare to speculate with the weather conditions. “Because the weather is getting a bit ugly, some farmers to harvest fish early KJA. There are also farmers who plant the seeds reduce fish so great loss, “said fish farmers KJA, Maman, told The Jakarta, last week.
Farmer losses could reach millions of dollars for failing to harvest fish cultivation KJA. Head of the Regional Office Technical Implementation Unit (UPTD) Aquaculture Fisheries Development Center Public Bodies Cirata, Ade Durahman, giving examples of November occurred KMI around 153 tonnes due to the quality of water decreases dramatically.
Of the total of KMI, which absorbed about 85 percent of the market price of six thousand dollars per kilogram. “Dead fish only sold six thousand dollars, whereas fish fresh condition can be sold up to 18 thousand dollars per kilogram,” said Ade, last week.
In fact, said Ade, dead fish could not have prices so the majority of farmers accidentally let it rot in the waters of the reservoir. This fish spoilage and polluting the waters thereby increasing the environmental burden in the reservoir.
“The carcasses of dead fish are left to rot in the waters of the reservoir can cause odor and make the water reservoir becomes rancid and slimy,” said researcher Associate environmental technology Agency for the Assessment and Application of Technology (BPPT), Nawa Suwendi, told The Jakarta, recently .
To prevent pollution of the water reservoir once the IMA, originally was published in West Java Governor Decree No. 41 of 2002 on Development and Utilization of Agricultural Land and Reservoir Region. KJA development in Cirata limited to 12 thousand plots. “In fact, now this number reached 53 thousand plots KJA,” said Ade.
Approach is difficult to apply the law, deception Ade, because Cirata wide. This reservoir has a total area of 7,111 hectares (ha) (including land) and a broad pool of approximately 6,200 ha. In addition, the presence of reservoirs in the three districts, namely West Bandung, Purwakarta, and Cianjur it difficult for enforcement.
When law enforcement does not work, the researchers tried to find the root causes of the IMA to offer a solution. KMI in Cirata allegedly caused water pollution leading to a reduction of dissolved oxygen (Dissolved Oxygen / DO).
Investigate a investigate, water pollution Cirata not only due to the presence of KJA which exceeds the carrying capacity of the environment, more so because Cirata is downstream of the flow of water from the River (Citarum and Cicendo) actually has contaminated domestic and industrial waste in the form of organic materials and inorganic.
“The level of pollution of the waters of the reservoir influenced their activities in the upstream watershed (DAS) that goes into the reservoir and the activity in the reservoir itself,” said Nawa. The effects of increasing pollution of reservoirs in the form of organic load and downs of the carrying capacity of the environment may cause a reduction in DO.
DO condition that usually gets worse when the weather is less friendly. Nawa explain the rainy season like now it will affect the discharge of rivers that flow into the reservoir to be able to cause the flow pattern in the waters of the reservoir. Flow pattern in this reservoir can cause the spread of pollution and sediments in the reservoir teraduknya.
“Teraduknya reservoir bottom sediment (organic matter) can interfere with the process of photosynthesis in aquatic organisms resulting in lower levels of DO,” said with a doctorate from the University of Indonesia.
Decreased levels of DO in the rainy season, said Nawa, compounded when the winds blowing parallel to the coast resulting in flows perpendicular to the coast, causing upwelling. Occurrence will result in the lifting of the upwelling of nutrients that exist in the base to the surface. The high nutrients in the surface can lead to hinder the process of photosynthesis organisms that live in the waters.
“Disruption of the process of photosynthesis means that inhibits the production of oxygen in aquatic organisms,” explained Nawa. The process of photosynthesis is also disturbed when clumps of clouds covering the sun rays to the Earth’s surface.
Nawa continue lasting cloud cover also affect the temperature of the air at the surface. The surface air temperature would then affect the temperature of the water reservoir, causing reduction in DO. “Reduced DO is what causes the IMA,” said Nawa.
Based on the research Nawa, KMI in Cirata in a year can occur more than once. In addition to the environmental impact, a negative impact on the economy KMI KJA owners who lost their capital and workers who have lost their livelihoods.
The collectors and fish traders are also affected because they could not sell. In the end, the supply source of protein ordinary people who eat fish also disrupted.
Cirata fish production, said Ade, so far to supply the protein source community in West Java, Central Java, and Jakarta. “Cirata fish production reached 240 tons per day,” he said.
Therefore, Nawa KJA suggested that fish farmers should not lose money in producing fish farming remains the balance between environmental, economic, and social. The balance of these three aspects are the pillars of sustainable development.
That is, when building a fish farming business KJA still consider the carrying capacity of the environment to the economy they are not disturbed because acaman KMI. No less important than that, the supply of protein for fish consumption did not break down.
A large number of fish were reported dead due to water pollution of three major rivers — Kolong, Kopili and Kiling — in Morigaon district, causing concern among environmentalists.
According to information received by the revenue department, arsenic poisoning from the ground water was suspected to have mixed with the rivers in spate resulting in the death of various types of fish during the last three days.
Stating that thousands of dead fish were seen floating on the rivers, revenue department sources feared that other aquatic beings might also have been affected.
Arsenic pollution was also reported in neighbouring district of Karbi Anglong and parts of Nagaon’s western and southern parts, besides along the inter-state Meghalaya border, causing the outbreak of viral diseases affecting the throat.
The revenue department has informed the Geological Survey of India about the situation and asked them to study the soil and the exact cause for the pollution.
Environmentalists were also concerned about the loss of fish in the three rivers.
Reports suggest that the incident has happened because the Vavan housing complex’s sewage system goes directly into the lake.
Mohsen Shokati, head of Rey City Environmental Protection Office, said that over 30 tons of fish have been killed in the past few days.
“Previously the housing complex’s sewage system poured into the lake through a canal, but now it directly goes to the lake,” he noted.
“Vavan housing complex needs a Water treatment facility. The construction work even started, but due to lack of budget the project was halted,” Shokati said, adding that the facility is currently 60 per cent complete.
He went on to note that Fashafuye dam’s water is being used for agriculture, fish farming, and animal husbandry.
Nearby residents suspected to be caused by water pollution. Haikou municipal environmental protection department sent to the scene, after a preliminary judgment as hypoxia, said the specific cause needs further investigation.
Apparently, the sudden lack of oxygen in a body of water would cause massive fish kills, which appear for days on the beaches of Manzanillo del Mar, north of the city. The community claims to be affected, because the smell comes to their businesses and homes and can not fish.
Some people claim that Karibana Manzanillo Club condominium sector, is causing fish kills that are in most of Manzanillo beach extension and channel beside Karibana.
Some members of the community, the condo, renowned for its great golf courses, sewage pours chemical channel, contaminating and killing the small fish and crabs.
Also stated that due to the environmental emergency, they hired Karibana machinery to collect fish and away from the place, also removing watercraft through waves, fish the body of water.
This means reached the affected area at the time and many dead animals were no longer visible in the channel, but on its banks, as well as almost the entire length of the beach, but when turned off the water craft, animals began to massively enter the body of water and died in seconds.
“We are concerned about the smell and leave us work because we have privatized a road to Punta Canoas and will be environmentally damaging. Now you can not fish, Karibana working with chemicals. There must be water pollution, “said Claudia Luna, leader of Manzanillo.
The community leader said the channel was in the community, however it Karibana Club privatized and there would be arriving the water with chemicals.
“In the channel there are many dead fish until eight days ago we thought it was a natural phenomenon of the sea, but we keep finding out, the lake is polluted and oxygen does not reach the sea,” he continued.
Jorge Ramos, another inhabitant “are making a public complaint to the environmental authorities take this and make studies in Guayepo pipe. We live on tourism, people can not stand the smell. We do not know if a chemical sprayed over the golf courses and is entering the pipe or if lack of oxygen. “
Do not throw chemicals
Karibana Club manager, Carlos Abuchaibe said that this phenomenon occurs on the beaches of Manzanillo, and especially in the channel is not a consequence of Karibana.
“It was high tide and entered an amount of fish as the tide had dropped by to go out further with decreasing oxygen died,” he said.
Abuchaibe claims that have not produced chemicals as some say, much less wastewater were discharged because they have two water treatment plants and sewerage system. One plant receives water from the submarine outfall to be treated, and it is this kind of liquid thrown into the golf courses to bring minerals.
He said the channel is not privatized, but was adequate with permits and IDs do ask those who come to fish for the safety of the club.
The equipment manager denies taking fish. On the contrary, claims that a retroescavadora removing sand. Finally said the fish kill has not only presented in Manzanillo, on other occasions also seen in Punta Canoas and Nozzle.
Thousands of dead fish abnormalities, white floating on the river and stinks km-long worried that people are the source of water pollution here.
Many days, people in blocks 2 and 3 wards mids (Vinh City, Nghe An), said Vinh River, state fish die-off. Thousands of well-identified white fish the river, loading stench anonymously, making people afraid of the water pollution of this place.
As noted by PV, on the third, the status of dead fish on the river a lot. Determination of dead fish is still the most popular river flows through Central Capital ward, bara Ben Thuy. In 1km range, determine the dead fish scattered everywhere, from 3-4 average 1m2 dead fish carcass.
According to Hoang, the time from the festival so far, river water unexpected turn smelly and opaque. There are many passages, river water appear black scum much like water and sewer.
Talking to the press, Mr. Nguyen Xuan Huan – Central Ward Chairman Admiral, verify the status of dead fish on the river that flows through the province and can be caused by many water sources have been polluted. “Ch sewer flooding did not detect any waste water from the plant into the river. Could cause fish kills caused by contaminated water.” Mr. Lord said.
According to Mr. Lord said, after discovering the incident, authorities have reported to the Department of Natural Resources Environmental Vinh City to ask for help, to clarify the situation cause this mass mortalities.