from http://www.qlwb.com.cn/2013/0718/15525.shtml
daily life daily, questioned, "looking at the mud soup in the Yellow River, and sometimes people throw rubbish on the shore. This kind of water can be leaked to the ground for drinking. "In fact, many people have doubts about this question. Many people in the forum have seen heated discussions. Then, the artificial transfer of the Yellow River water, through the reservoir leakage, will not be contaminated by the treatment of pollution of groundwater, pollution of the spring water? To this, the Ji'nan Municipal Public Services Bureau in charge of the responsible person to respond.
[b] does not adjust water directly from the Yellow River, but takes water library water [/b]
the Yellow River water south tune. The impression of many citizens is that the muddy the Yellow River water directly enters the southern leakage zone. Mr. Sun asked, "how can we ensure that no water pollution can be ensured if the mud like the Yellow River water enters a strong seepage area?"
this is not the case. "The the Yellow River water itself is relatively cloudy, and if it is directly induced into the strong seepage area, it will even cause blockage in the strong seepage area." In this regard, the Ji'nan Municipal Public Utilities Bureau of the relevant responsible person said that the southern the Yellow River water is not directly from the the Yellow River water, but from the magpie mountain, Yuqing lake two reservoirs water.
magpie reservoir and Yuqing lake reservoir are the two large water tanks of Ji'nan. All two reservoirs are yellow river reservoir. And the two source of the the Yellow River water diversion pipeline is the two reservoirs.
the water of the two major reservoirs is so clear that it is not so cloudy as the the Yellow River water. Why is this? It is understood that the water of the Yellow River must first pass through the sediment pool, through precipitation and preliminary purification measures, to enter the reservoir. As a result, the water in the reservoir looks very clear.
it is understood that the raw water entering the seepage zone has high requirements for ammonia nitrogen content and bacterial population. Before entering the strong seepage zone, the raw water must be tested before reaching the standard.
[b] reservoir bottom 1 meters of filter layer [/b]
about the strong seepage zone for the purification of water quality, many people also have doubts. "Strong seepage zone is like an opening on the vein of the earth, and the sewage will cause blood poisoning." Netizens "broken iron pot" believes that the water quality of the Yellow River is poor, and after strong seepage zone enters the underground, it will pollute the groundwater.
to this, the Ji'nan Municipal Public Utilities Bureau said that these questions are not completely unreasonable. If the pollutants enter the strong leakage zone, the groundwater will be polluted. However, before the implementation of the project, various impacts have been taken into account, and various measures will be taken to prevent groundwater pollution.
according to the introduction, the gravel layer of the Yufu river is about 20m thick, the thickness of clay layer is 90m, and about 110m-140m is limestone. In addition, the bottom of the leakage reservoir will be artificially laid sand cushion and gravel filter layer, the thickness is more than 1 meters, the removal of most inorganic particles, organic matter, bacteria, viral pathogens and so on. In addition, some metal elements are retained by means of ion exchange, surface adsorption and so on.
at the same time, in view of the eutrophication and other problems of water body, the artificial intervention measures will be carried out. The ecological floating island is set up on the water surface, that is, the algae and so on. The strong roots of plants are used to form a dense net in the water, and a large number of suspended substances are adsorbed in the water body to purify the water quality.
"the photochemical effect and biodegradation in the process of natural purification can not be achieved in water treatment plant, so natural purification is more advantageous than water purification." The person in charge said.
[b] leakage at the bottom of the reservoir at the bottom every four days refurbishment of [/b]
seepage reservoir and other reservoirs have obvious differences, leakage of the reservoir and very years of water, can not run continuously.
the responsible person of Ji'nan Municipal Public Utilities Bureau said that at present, Israel uses surface seepage water to transform surface water into underground water, and its operation is quite successful. The Ji'nan project has been used for reference.
therefore, the mode of rotation is very important for the groundwater recharge. The single reservoir is not running continuously, but after the seepage is completed, it is maintained and cultivated on the bottom of the reservoir. According to the introduction, every time the water is pumped into the reservoir, it can be completely leaked for two days. After the air is dried, the machine will be used to refurbishment the bottom of the reservoir. "It is to cultivate farmland to be cultivated." The person in charge said that the renovation would be carried out every four days.
through rehabilitation and cultivation of the function of seepage reservoir, artificial intervention measures such as refurbishment, maintenance of gravel layer and silt clearance make the seepage reservoir maintain a lasting recharge function.
[b] leakage area around the area will be set up [/b]
[/b]
will the strong leakage belt affect the groundwater quality because of the surrounding environment pollution? The responsible person of the Municipal Public Service Bureau of the Ji'nan Municipal Public Utilities Bureau admits that the strong leakage zone can cause the water to infiltrate, and is also easily contaminated by the pollution of the raw water and the surrounding environment, and affects the groundwater quality. .
is therefore very important for the detection of raw water quality. It is reported that the water quality of each monitoring point was detected before the project started. The 3 round was launched in May and monitored once a week after completion of the project.
at the same time, the leakage reservoir should be clearly defined as the water source, and the fence should be set at the boundary of the protected area and there should be obvious signs or markers.
the responsible person of the Ji'nan Municipal Public Utilities Bureau said that the greening protective belt around the seepage reservoir will be set around the seepage reservoir, the pollution sources of the surrounding farmland fertilization and other pollution sources will be prevented and controlled, and the industry that pollute the water source environment will be avoided, and the managers should be arranged to inspect and monitor the reservoir area.