Kuronga nekushandisa masisitimu emvura inoyerera mumaguta
Kudhonza mvura mumaguta ndeimwe yezvivakwa zvikuru zvinosarudza hupenyu hweguta. Kana masisitimu emvura asina kurongwa zvakanaka uye kushandiswa, migumisiro yacho inopfuura kungozara kwemvura mumigwagwa, kusvika pakukanganisa kufamba, kukuvadza midziyo, kuwedzera mari yekugadzirisa migwagwa, kuderedza kunaka kwezvakatipoteredza, uye kunyange njodzi dzehutano hwevanhu dzinokonzerwa nemvura yakasviba. Pakati pekuchinja kwemamiriro ekunze zvichikonzera kunaya kwemvura kwakanyanya uye kukura kwemaguta nekukurumidza zvichiwedzera kudiwa kwenzvimbo dzisingapindi mvura, kuronga nekushandisa masisitimu emvura mumaguta kwave chinhu chakakosha, kwete kungova chirongwa chehunyanzvi chete.
Pfungwa Dzekutanga dzeKudhonza Mvura Mumaguta
Kazhinji, nzira dzekubvisa mvura mumaguta inzira inofambisa mvura nekudzora, kunyanya mvura inonaya (inoyerera) uye inoyerera pamusoro pemvura, kudzivirira kuungana kana mafashamo. Kusiyana nenzira dzekubvisa mvura mumaruwa, dzinonyanya kushandisa nzira dzechisikigo, maguta anotarisana nematambudziko akasiyana: nzvimbo dzakakura dzakafukidzwa neasphalt nekongiri, nzvimbo diki, nzvimbo dzakasimba dzepasi pevhu, uye kuvapo kwemarara emumba anowanzo pinda munzira. Nokudaro, nzira dzekubvisa mvura mumaguta dzinofanira kugadzirwa senetwork yakabatana, inosanganisira nzira dzekutanga, dzechipiri, uye dzechitatu, zvivakwa zvekubatsira (maculvert, mainlets, matangi ekudzora), madziva ekuchengetedza/ekuvharira, uye mapombi panzvimbo dzakatarwa.
Nzira dzemazuva ano dzinosimbisa nzira dzekubvisa mvura dzinogara kwenguva refu, dzakadai sepfungwa dzeSustainable Urban Drainage Systems (SUDS) kana Low Impact Development (LID). Nheyo huru ndeyekuchengetedza, kupinda, uye kunonoka kuyerera kwemvura pedyo nekwainobva sezvinobvira, pane kungoirasa nekukurumidza sezvinobvira pasi pemvura. Izvi zvakakosha nekuti kuyerera nekukurumidza kunowanzo chinja matambudziko emafashamo kubva kune imwe nzvimbo kuenda kune imwe.
Matanho Ekuronga Masisitimu Ekubvisa Mvura
1. Ziva Matambudziko Nezvinangwa
Danho rekutanga nderekunzwisisa matambudziko aripo: nzvimbo dzinodira mvura, kuwanda kwemafashamo, huwandu hwemigero, kuvharika kwemvura, uye hukama huripo pakati pemvura inoyerera nerwizi rukuru kana nzira yemigero. Zvinangwa zvekuronga zvinofanirwa kurongwa zvakajeka, semuenzaniso, kuderedza mvura inodira mvura mukati menguva yakatarwa yekudzoka (makore 2-5 emigwagwa yemunharaunda, yakakwirira kune nzvimbo dzakakosha), kudzora hunhu hwemvura inoyerera, kana kuwedzera kusimba kwemvura inonaya zvakanyanya.
2. Kuunganidzwa kweData
Kuronga nzira dzekubvisa mvura kunoenderana zvikuru neruzivo rwakakwana, kusanganisira:
– Ruzivo rwemvura inonaya zuva nezuva uye huwandu hwemvura inonaya (IDF: Kuwanda-Nguva-Kuwanda-Kuwanda).
- Mepu dzenzvimbo nenzvimbo dzakatenuka.
– Kushandiswa kwevhu (dzimba, maindasitiri, nzvimbo yakavhurika yegirini).
- Network yechiteshi iripo uye mamiriro ayo chaiwo.
– Ruzivo rwevhu uye kugona kwaro kupinda kwevhu.
– Ruzivo rweTidal (rwemaguta ari kumahombekombe) uye kukwirira kwemvura yerwizi.
- Rumwe ruzivo nezvekushandisa (mapaipi emvura yekunwa, gasi, tambo) kudzivirira kusawirirana kwenzira.
Hunhu hwedata hunoratidza kururama kwedhizaini. Mumaguta ane data shoma remvura, nzira yekuchengetedza, ongororo dzemumunda, kana modhi yakavakirwa pasatellite uye kuyerwa kwekuwedzera zvinodiwa.
3. Kuongororwa kweMadzimu
Kuongorora kwemvura kunovavarira kufungidzira dhizaini yekuyerera kwemvura. Nzira dzinoshandiswa dzinosanganisira Rational Method yenzvimbo diki dzemvura, kana unit hydrograph uye modeling yemvura inoyerera yenzvimbo dzakakura dzemvura. Zviyero zvakakosha zvinosanganisira mvura inoyerera, iyo inokanganiswa nerudzi rwepamusoro, uye nguva yekuwanda kwemvura, iyo inotsanangura kumhanya kunoita mvura kusvika pachiteshi chikuru.
Kuwedzera pakubuda kwemvura yakawanda, kuronga kwemazuva ano kunotarisawo huwandu hwemvura inoyerera. Izvi zvakakosha pakugadzira madziva ekuchengetera mvura uye matsime emvura, ayo anochengetedza mvura kwenguva pfupi.
4. Kuongororwa kweMagetsi eMambure
Kana dhizaini yacho yazivikanwa, ongororo ye hydraulic inoitwa kuti ione saizi yemugero, nzvimbo yekudzika kwemugero, kumhanya kwekuyerera kwemvura, uye mwero wemvura. Mugero unofanirwa kunge wakakura zvakakwana kuti ukwanise kutakura mugero usingapfuure, asi kwete wakakura zvekuti unokonzera kuyerera kunononoka, kudonha kwemvura, kana kuvharika. Kune migero yakavharwa, kumanikidzwa, kugona, uye kugadziriswa kwemugero kunofanirwa kuongororwa. Kune migero yakavhurika, kuchengetedzeka, runako, uye njodzi yekurasa marara zvinofanirwawo kufungwa nezvazvo.
Kugadzira mamodeli uchishandisa software (semuenzaniso SWMM, HEC-RAS, kana mapuratifomu eGIS) kunowanzo shandiswa kuongorora mamiriro ekunaya kwemvura kwakanyanya, shanduko mukushandiswa kwevhu, uye mhedzisiro yebudiriro itsva.
5. Sarudzo yeMhinduro: Maumbirwo uye Asiri Maumbirwo
Mhinduro dzemvura hadzingosanganisiri kuwedzera migero chete. Sarudzo dzakajairika dzinosanganisira:
- Kugadzirisa uye kugadzirisa nzira dzakakuvara/dzakavharika.
– Wedzera kugona kwemvura nekuwedzera kana kutsiva ma culvert.
- Dziva rekuchengetera/rekuchengetera mvura kuti ikwanise kuburitsa mvura yakawanda.
- Matsime ekupinda, maburi emhuka, uye nzira inoyerera mvura kuti iwedzere kupinda kwemvura.
- Nzvimbo dzakasvibira dzakasvibira uye mapaki ekupinda kwemvura sezvivakwa zvegirini.
– Masisitimu epombi nemvura munzvimbo dzakaderera kana dziri pamhenderekedzo yegungwa.
- Kutarisira marara nekudzidzisa veruzhinji, kusanganisira kutarisa kuraswa kwemarara.
Nzira yakanakisisa inowanzo kuve musanganiswa, wakagadzirirwa mamiriro evhu, mitengo, uye zvinodiwa kwenguva refu.
Kuitwa kweSisitimu yeDhara reMaguta
1. Kugadzirira Dhizaini Yeinjiniya Yakadzama (DED)
DED inosanganisira madhirowa ehunyanzvi, kuverenga magadzirirwo, marongero ezvishandiso, nzira dzebasa, uye hurongwa hwebhajeti. Danho iri rinoda kurongeka kwemabhizinesi akasiyana-siyana kuti ive nechokwadi chekuti nzira yemugero haipesane nedzimwe nzvimbo dzemagetsi nekuvakwa kwemigwagwa. DED inofanirawo kufunga nezvenzvimbo dzekushanda nekuchengetedza, senge nzvimbo yemigero yemvura, matangi ekudzora, kana nzira dzekuongorora.
2. Kutenga nekuvaka
Kushandiswa kwenzvimbo dzebasa kunowanzosangana nematambudziko: nzvimbo shoma yekushanda, kufamba kwevanhu vakawanda, uye mamiriro evhu asingaenderane nezvaifungidzirwa. Nokudaro, manejimendi ekuvaka anofanira kukoshesa kuchengetedzeka, manejimendi ekufamba kwevanhu, uye kudzorwa kwemhando yepamusoro. Zvinhu zvakakodzera (kongiri yakasimbiswa, masonry, HDPE pombi, kana maculvert emabhokisi akagadziriswa kare) zvinosarudzwa zvichienderana nekutakura kwevanhu, hupenyu hwedhizaini, uye nyore kwekugadzirisa.
Hunhu hwebasa rayo hwakakosha pakugara kwenguva refu kwehurongwa. Zvikanganiso zvidiki zvakaita sekubatanidza mapaipi anodonhedza mvura, kukwira kwemvura kusina kunyatsojeka, kana kusakwana kwenzvimbo dzekupinda dzinogona kukonzera mafashamo anowanzoitika.
3. Kuedza Kushanda uye Kuedza Kushanda
Usati wapa mvumo, sisitimu iyi inofanira kuyedzwa kuti ionekwe kuti mvura iri kufamba zvakanaka, hapana mvura inodzokera shure, hapana mvura inodonhedza, uye kuti nzvimbo dziri kupinda nadzo mvura dziri kushanda kuti dzitore mvura kubva pamusoro pemugwagwa. Munzvimbo dzinosangana nemafashamo emafashamo, kuyedza mashandiro emagedhi nemapombi emvura kwakakosha, pamwe chete nekuwanikwa kwesimba remagetsi.
4. Kushanda uye Kugadzirisa
Masisitimu mazhinji emvura anokundikana kwete nekuda kwekugadzirwa kusina kunaka kwekutanga, asi nekuda kwekusagadziriswa zvakanaka. Marara ndiwo muvengi mukuru wemvura inoyerera mumaguta. Chirongwa chekugadzirisa chakakodzera chinofanira kusanganisira:
- Kuchenesa nguva dzose ma inlet, matangi ekudzora uye ma channels.
– Kubviswa kwedota nguva nenguva.
– Kuchekerera zvirimwa mumigero yakashama.
- Kuongorora chimiro chechinhu kuti uone kutsemuka, kudzikira, kana kusuduruka.
- Sisitimu yekuzivisa vagari vemo uye mhinduro dzinokurumidza kana paine zvipingamupinyi.
Kugadzirisa zvinhu kwakabatanawo nehutongi: ndiani ane basa muchikamu chimwe nechimwe (guta, mugadziri wezvinhu, kana nharaunda), uye kuwanikwa kwebhajeti rinogara kwenguva refu.
Matambudziko uye Nzira dzeKubudirira
Kuenderera mberi, kuronga madhairekitori emvura mumaguta kunofanira kunge kuchichinja-chinja. Kuchinja kwemamiriro ekunze kunoreva kuti ruzivo rwekare rwemvura haruwanzoratidza mamiriro emangwana. Nokudaro, magadzirirwo anofanirwa kusanganisira zvinhu zvekuchengetedza, mamiriro emvura yakanyanya kunaya, uye nzvimbo yekuwedzera kugona. Uyezve, pfungwa ye "sponge city" iri kuramba ichikosha: maguta akagadzirirwa kunwisa nekuchengetedza mvura kuburikidza nenzvimbo dzakasvibira, matangi emvura mumaguta, uye pamusoro pemvura ine maburi.
Kuchinja kwedhijitari kuriwo tsika, nemienzaniso inosanganisira masensa emvura uye masisitimu ekunyevera ekukurumidza kufashamira akabatana nenzvimbo yekudzora. Neruzivo rwenguva chaiyo, vatungamiriri vanogona kutungamira mabasa ekuchenesa, kushandisa mapombi, kana kuvhara magedhi emvura nekukurumidza.
Penutup
Kuronga nekushandisa masisitimu emvura mumaguta inzira yakasiyana-siyana inosanganisa hydrology, hydraulics, kuronga nzvimbo, kuvaka, uye kutonga. Kubudirira hakungoyerwi nehukuru hwemachannels chete, asiwo nekukwanisa kwesisitimu kuderedza njodzi yemafashamo, kuchengetedza hunhu hwezvakatipoteredza, uye kushanda zvakavimbika kwenguva refu. Nekubatanidza zvivakwa zvisina kuchena (migero, maculverts, mapombi) uye zvivakwa zvegirini (masisitimu ekupinda, nzvimbo dzakasvibira), maguta anogona kuva akasimba zvakanyanya pakunaya kwemvura kwakanyanya uye kukura kwemaguta kuri kuramba kuchiitika. Kana akarongwa zvichibva padata, akavakwa zvakanaka, uye achigara achichengetwa, masisitimu emvura mumaguta inyaya yakakosha mukuchengetedza maguta uye kugara kwenguva refu.
