The last ten-day of a month was entered in May " dragon boat water " after precipitation period, much field rainstorm invades Zhongshan. On May 27 before dawn, zhongshan city general falls to arrive greatly rainstorm, local and especially big rainstorm, system of drainage of the city zone faces test.
Face rainfall, does Zhongshan the city zone come for years is storm water dip relatively serious " leach macula " circumstance how? The reporter visited the city zone and photograph adjacent township recently each leach macula, discovery does not calculate as a result of rainfall serious, road of the celestial being that divide ease and humanitarian are handed in 7 times assemble place leach case relatively serious outside, the city zone did not produce large area waterlogging.
From 2015 the end of the year " drain off water of Zhongshan city town (rainwater) prevent waterlogging plans integratedly " since the work out is finished, zhongshan city emerges through building pumping station, inland river the measure such as macula of leach of clear silt and boiler circulation, punish, advance waterlogging of central the city zone to administer the job, alleviated on certain level waterlogging problem. But from the point of actual condition, still put in many weak point.
Write civil: Reporter Zhongzhen believes Liao Han of southern daily reporter
Photography: Xie Zhiwen of southern daily reporter
Visit
Partial the city zone " leach macula " improve somewhat
Be located in a section of a highway of hill hillock memorial archway of torch developing zone, the rain that goes a few years period put in serious seeper problem all the time, last year the rainstorm of the first ten days of a month is medium in June, seeper is as high as 0.8 meters for a time, cause many car to anchor. But on May 27 the reporter visits discovery in the morning, although experienced one night rainstorm, a section of a highway of hill hillock memorial archway did not appear serious seeper, car can pass through normally.
Comb the city zone that a few years pluvial period media reported in the past " leach macula " , its distributing limits is centered in Kang Hua road, promote the road austral harbor, emerald green Jing Beilu, Sun Wendong a section of a highway such as road, Qi annulus road, sanded harbor road. The reporter visits afore-mentioned a section of a highway in 27 days, did not discover serious seeper likewise, car is current in order.
Nevertheless, did not appear this to accumulate water situation badly, have particular concern with rainfall. According to management board of Zhongshan city lash-up 3 prevent sign up for only, whole town of Zhongshan of this strong rainfall in all 10 township rainfall exceeds 50 millimeter, among them 5 township rainfall exceeds 100 millimeter, the biggest rainfall appears in area of the eastpart part, south. Look from horizontal all along, the rainfall of this Zhongshan not as good as partial periphery city is serious; Even if all along looks, also be not a patch on the rainfall of the first ten days of a month is serious last year in June -- this strong rainfall can is only to system of drainage of the city zone " quiz " .
Meanwhile, the leach this year sends Zhongshan easily dot repair work also had apparent effect. According to media coverage, before this year April, central the city zone sends a dot easily to 6 leach to have repair, include Jin Zishan to channel, near rainbow highway terminal market, near Qi Jiang Daqiao, haven protects benefit square, humanitarian 2, Yue comes south the road is handed in assemble place, civilian section the road hands in Lu Kanghua on the west collect place. In addition, center of work of Zhongshan town drain off water from the city zone of open of 27 days of before dawn 34 pumping station of 19 drain flooded fields, pump discharge seeper, in 6 hours of time platoon generosity amounts to 700 thousand stere.
But in road of celestial being of developing zone ease and humanitarian 7 are handed in collect crossing, perplex old seeper issue to still exist. According to reporter spot understanding, on May 27 before dawn, municipal safeguard central staff member to come to 7 to road of ease celestial being and humanitarian hand in collect place begin catchment. But the reporter sees in the spot 27 days morning, crossing still has more than half meters seeper, for a time no entry, about 56 cars anchor in seeper. One comes from Guangzhou the driver of Zhongshan tells a reporter, oneself had sailed in 27 days of before dawn when this one crossing, because colour of sky is too dark,did not observe crossing water level in time, make car anchors into water, can await trailer arrival in place only. This also explains, of the city zone " leach street " the circumstance still exists, how to accept the test of the flood season that has come, remain a challenge to Zhongshan.
Processing
Project of the punish that start fills on " historical bills due "
Urban waterlogging problem, it is current and common " the city is ill " one of, zhongshan is not exceptional also. Regard a region of rivers and lakes austral typical mountain as the city, the Zhongshan with densely covered a network of rivers faces pressure of greater drain flooded fields for a long time.
Specific the reason that forms to waterlogging, more complex, include landform element, natural ingredient and factitious factor. Nie Hongwen of chief engineer of designing institute of program of city of members of standing committee of Zhongshan city the Chinese People's Political Consultative Conference, Zhongshan was in 2014 " Zhongshan city prevents drain flooded fields to plan to carry out " of waterlogging of city of Zhongshan of one article lieutenant general form return for 3 big kinds: Design standard on the low side, ground level on the low side, drainage system blemish.
Because time of tubal canal laid is early,designing standard on the low side waterlogging is, design level is low, cannot satisfy current situation requirement. The century on locate of shop of net of be assigned personal responsibility for of greater part of Zhongshan old the city zone 889 time, design standard on the low side, when experience exceeds standard rainstorm, cause seeper extremely easily, appear " leach macula " . This also is Zhongshan the city zone major " leach macula " form a reason. Nie Hongwen expresses, zhongshan city fastens all respect existence to compare much historical bills due in urban drain off water. "In developing a process, the thing on the ground is built piece, the construction of subterranean establishment was not taken seriously, bills due is much. Bills due is much..
Because ground level is inferior,ground level on the low side waterlogging is, water pipeline lifts easily because of river side water level and catchment not free, cause waterlogging, a section of a highway of 7 ease celestial being belongs to humanitarian this one circumstance. Level of ground of this a section of a highway is controlled 2 meters only, far the elevation of 3.5 meters of above that asks under the program.
Because catchment conduit time is earlier,drainage system blemish waterlogging is, urban extend causes partial river to emerge by embezzlement or enclothe, not perfect, management is less than drainage system bring about short of catchment to ask.
2015, "Processing town is easy waterlogged dot " be included in those days real issue of 10 the people's livelihood of Zhongshan city, perplex Zhongshan citizen's old easy waterlogged issue to get attention fully. 2015 " Zhongshan almanac is built piece " show, zhongshan city wove in June 2015 it is important to finished central the city zone o'clock sharp of leach of a section of a highway administers program, central the city zone black o'clock sharp of leach of main a section of a highway manages a project cent period is carried out. Among them, first phase basically includes drive up Zhongshan road and sinkage of 4 mouth of across of path removing a bay Duan Lu face; Hua Bailu is reached in the path removing a bay, path in promoting, always install all the way (Yue Yingxin city) mouth of Xin Zengyu water and storm sewer, first phase always invests about 69.17 million yuan.
To 2017 the beginning of the year, always install all the way, promote China street, Hua Bailu, Zhongshan the 4 leach such as the road, path in promoting nod punish to the project completes main body project and restore have transport service. After punish project is carried out, the 4 leach a section of a highway such as the road, path in promoting and Hua Bailu can satisfy Zhongshan " encounter 10 years " waterlogging prevention and cure designs a standard, always install all the way (Yue Yingxin city) can satisfy " encounter 30 years " waterlogging prevention and cure designs a standard.
Came 2016 during 2017, zhongshan city is built in all, rebuild overall length of conduit of sewage, catchment is close 55 kilometers, ability of urban prevent waterlogging increases further. Introduce according to controller of center of work of Zhongshan town drain off water, after be transformed through round, of Zhongshan the city zone " leach macula " the problem had bigger improvement. "Some places may be when rainstorm cannot seasonable catchment, but after rainstorm signal removes seeper is basically OK very fast retire. But after rainstorm signal removes seeper is basically OK very fast retire..
Nie Hongwen expresses: "The drainage system of Zhongshan is in all the time ceaselessly in the perfect, process that improves steadily. Compare at 15 years, present circumstance is improved somewhat, but also some of weak point still exists. " he thinks, zhongshan still needs a few time to fill historical bills due on.
Perfect
Build " sponge city " had paid day-to-day government
From in the long run, solve waterlogging problem, must want to have the idea of global system. "Of catchment is the project of a systematization, the concept that a catchment administers. Water pours to inland river from conduit flow, discharge again next go out, need integrated consideration. " Nie Hongwen says.
2015, nie Hongwen puts forward " about administering town waterlogging, advance " sponge " the proposal that the city constructs " draft resolution, the rainwater that suggests Zhongshan study draws lessons from domestic and international success manages experience, carry out concept of zoology environmental protection, implementation " high level rain corrupt billabong, small effect develops construction " target, big thrust is permeated into natural stockpile, nature, purify naturally " sponge city " construction.
With annual bottom, " drain off water of Zhongshan city town (rainwater) prevent waterlogging plans integratedly " the work out is finished. The program is based on " sponge city " concept, put forward to pass a variety of projects and compose of blame project measure to build new system of prevent waterlogging of Zhongshan town drain off water. "Sponge city " the eye shot that the concept begins to enter Zhongshan person.
"Sponge city " be like showing the city can resemble sponge, change in acclimatization and should wait for a respect to have to natural disaster good " stretch " . Nie Hongwen suggests to increase the fountainhead of pair of urban water runoff to control, develop urban greenbelt, road, water system to wait to be inducted to rainwater, harbour ooze and modulatory action, alleviate urban waterlogging, permeate to make natural stockpile, nature, the sponge city that purifies naturally provides safeguard.
"Sponge city " concept, begin to be in nowadays Zhongshan is reflected somewhat in municipal project. Surface of road of municipal main force and integrated promotion transform the central the city zone of the start working end 2018 project, consider the punish of pair of leach circumstances, use appear water brick to pave a road afresh, in order to achieve better ooze water result.
Traditional drainage system with " row " give priority to, lack integral consideration, often appear " cure easy waterlogged dot, appear again easy waterlogged dot " circumstance. Nie Hongwen suggests Zhongshan makes good drainage system " ooze, sluggish, harbour, with, row " government works, protect and restore a river to emerge surface, raise urban water rate, reduce horniness shop outfit, aggrandizement rainwater on the spot is digested and use project.
"' sponge city ' the concept lets whole town form namely big ' sponge body ' , do work of good store water, can ease short-term catchment pressure so, after waiting for rainstorm to pass, the drain flooded fields with old repass stands slowly water eduction. " Nie Hongwen says. "Build, rebuilt place also ought to implement this one concept as far as possible, let waterlogging appear underground, form ' body of small foam rubber or plastic ' . The river emerges surface rate wants to maintain, want to create pool of labor of a few attune, artificial lake artificially even, increase store water capacity. Increase store water capacity..
However, "Sponge city " of the concept carrying out is a long-term course, need investment of much manpower material resources, short-term inside the partial waterlogging problem that inextricability Zhongshan exists at present. Set out from realistic point of view, nie Hongwen suggests the government should stress measure of good blame project. "Construction is periodic, need time and investment, the program also needs to be carried out through management very much again. Eye comes round to say, right ' leach macula ' the lash-up during day-to-day management and rainstorm is more direct and effective. Right ' leach macula ' the lash-up during day-to-day management and rainstorm is more direct and effective..
Southern daily
