source: the author of the Qilu Evening News: Wang Guang Ying
the municipal staff are managing the river course in the city and building the water body Scenery。 Newspaper reporter Wang Guangying
trainee reporter Chen Xi reporter Wang Guang Ying / >
recently, this newspaper reports on the utilization of surface water from the strong leakage area to the underground water project, which has aroused the attention of many citizens. How does the surface water become groundwater and enter the water supply network? How much is the proportion of the groundwater in the municipal water supply system in the future? How to prevent the leakage of the sewage? Recently, a series of questions were answered by the people in charge of the Ji'nan Municipal Public Service Bureau.
[b] ten before the art festival to build
two seepage reservoir
[/b] "to transform the surface water into groundwater, the main project is to build the pond and seepage reservoir in the strong seepage area, and intercept the original or invoked surface water and" circle "to make it infiltrate. Liu Mingcui, the head of the ground water transfer project Department of the Ji'nan Municipal Public Utilities Bureau, said that the reservoir water and the Yellow River water can be converted into high quality groundwater through soil filtration and permeation. In the case of keeping the spring water flowing continuously, the groundwater is collected for the residents' life.
Liu Mingcui gave the reporter an analogy, if the whole ground water was seen as a basin, the pond and the leaking reservoir were the leakage points on the basin, and the water permeation made the whole basin more water. Unlike the southern Hushan Reservoir and the Yuhua lake reservoir, the reservoir is the replenishment reservoir, which is used to recharge the groundwater.
it is introduced that the provincial capital will start the 7 major surface water conversion projects this year, including the first phase of the yuuhe Geopark, the pilot project along the Yellow River, the first phase of the yamazhuang project in the upper reaches of the yuuhe River, the west gate of Changqing, the transformation project of the Phoenix Road pipeline, the Xingji River and the East ditch of the square.
, the first phase of the Yufu River Geopark project is to build a pumping station in Yuqing water plant to build a 7.6 km water pipeline from water works to Yang Tai Village, and send the Yellow River water to the two leaking reservoirs in Dong Zhuang village and Yang Tai Village, which will be completed before the ten Festival.
, in addition, the upper reaches of the yuuuhe river will also build two leaking reservoirs in the south of jiamazhuang and the north of jiamazhuang, through the construction of the source pipeline from the magy Hua water plant to the yuufu River, the same yellow river water to the seepage reservoir, to the West Suburb Water plant, and strive for completion by the end of the year.
"through the surface water conversion project, the Yangtze River water from the Yellow River and south to north water will become the high-quality groundwater of Ji'nan." Liu Mingcui said that, combining the transformation of the Phoenix Road, we will build a pipeline to transport the water from the Changjiang River from the south to the north to the Juye River, Han Canghe and Liu Gonghe in the lower reaches of the wolf cat's mountains and rivers, and plan to build a leaky reservoir on the three rivers for 2014-2015 years.
[b] underground 350 to 500 meters
depth of pumping water
[/b] according to the staff of the Ji'nan Water Conservancy Bureau, at present, about 94% of the water use in Ji'nan is surface water. During the period from July 2012 to October, the two phase of the west of Jixi was used as a water supply. At least 45 thousand tons of water were used every day, and the proportion of surface water decreased. But after entering winter, the situation of Bao Quan is severe, and the two phase of water supply is stopped. "
" after the implementation of the surface water conversion project, will be the same as the flood season, the continuous replenishment of groundwater throughout the year, the proportion of water supply pipeline inland water will continue to increase. It is reported that after the surface water conversion project has raised the groundwater level, the water works will be pumped from the underground 350 to 500 meters deep, so the water quality is very good.
Liu Mingcui said that two reservoirs in Dong Zhuang and Yang Tai are designed for 2 million 400 thousand parties, which will increase the groundwater level and enhance the ability of the West Suburban water plant to extract groundwater. It is expected to make up 400 thousand parties per day. However, how much of the 400 thousand groundwater can enter the water supply network for the public to drink, and it needs to be completed after the project is completed. After testing and taking into account the recharge of groundwater, it is determined.
"the higher the groundwater ratio in the water supply pipeline, the better the water quality." It is said that in the future, Ji'nan original [url=http://www.dzwww.com/shandong/sdnews/201303/t20130303_8068648.htm# ": 24hmh4jn] surface water treatment [/url:24hmh4jn] system as emergency (or standby) equipment, groundwater and surface water two sets of water system coexist, Liu Mingcui confirmed this news.
what proportion of water will be used for future groundwater? Liu Mingcui said that surface water needs complex and expensive treatment to become qualified drinking water, and the increase in the proportion of groundwater will also greatly reduce the cost of water treatment.
"our goal is not only 50% of the water supply ratio, but also higher, and even in the near future it will allow the Quancheng people to drink 100% of the high quality ground water." Liu Mingcui said.
many people also have doubts about whether the speed of groundwater infiltration can catch up with the mining speed. Liu Mingcui said that the surface water infiltration process is very complicated and can not be formulated. The reservoir of Yufu mountain is fed to the Yufu river every year, and the relevant departments and experts have done the investigation, and the groundwater level of the related basins is obviously rising in about 7 days. Liu Mingcui said that achieving the goal of drinking high quality groundwater is not overnight. We need to build more leakage reservoirs and make full use of strong seepage areas.
Liu Mingcui also stressed that a prerequisite for residents to drink groundwater is to ensure that the underground water level is sufficient to keep the spring flowing. This system project will synchronize the four goals of "good gushing of famous spring, drinking high quality groundwater, reducing water supply cost and safe operation of urban water supply".
[b] surface water conversion of groundwater channel pollution control is the premise [/b]
"the idea of surface water conversion to groundwater is very good, but many rivers and rivers in the province are pile up, the water quality is very poor. If through these strong infiltration areas, how to have an irreversible effect on the groundwater quality, how to do it?"
a strong leakage zone is equivalent to an undeveloped subterranean river entrance, which does not have a natural filtration and purification function, even if the pollution grade is low, it will cause groundwater. Pollution. With the lack of biological communities in the aquifer, there is almost no self purification function, and the pollution is almost irreversible.
the "strong seepage zone" is like an opening on the vein of the earth. The sewage will cause blood poisoning. In this regard, the netizen "broken iron pot" said that the upstream water quality has changed the water, and then through the strong leakage zone into the underground, that is, from the surface water pollution to upgrade to the pollution of groundwater.
the relevant department staff said that many rivers, including the Dali gully, were strong seepage zones, and some rivers were in the groundwater recharge areas, and the garbage was infiltrated into the underground river slowly, and it did have a great impact on the groundwater quality.
"surface water to transform groundwater is a prerequisite for sewage interception." The head of the Ji'nan Drainage Management Service Center said that the city of Ji'nan is carrying out the large-scale pollution control project of the river channel, and the pollution in the upper reaches of the public is also in the management plan, and it is the key point. Ten before the art festival, 48 river courses in the urban area will be completed. At that time, the urban river will not be directly discharged, and no garbage can be seen in the river.
Liu Mingcui said that the provincial capital has identified 24 strong leakage areas years ago, but some of them have been planned as residential or commercial land, and there are also domestic waste pollution. At present, the location of the new leakage reservoir is located in the upstream channel of Yufu River and La Shan River. The planned dam and seepage reservoirs in the permeable area will cut off pollution before construction and control the surrounding waters to ensure groundwater quality.
"after the completion of the upstream leakage reservoir, the groundwater quality and the water replenishment of the upstream reservoir will be monitored through the detection wells below the river." Liu Mingcui introduced that before the ten Art Festival this year, 12 test wells will be built along the southern bank of the Yellow River in Changqing, Licheng, Zhangqiu and other places. In addition to measuring the relationship between the [url=http://www.dzwww.com/shandong/sdnews/201303/t20130303_8068648.htm# "24hmh4jn] groundwater recharge amount [/url:24hmh4jn] and the mining amount, the groundwater will also be monitored to prevent pollution.