Kugeza ubu, igihugu cyanjye gishyira mu bikorwa gutwika imyanda yo mu ngo, kandi imyanda y’imyanda y'ibanze izagabanuka buhoro buhoro. Ariko buri mujyi ukenera byibuze imyanda imwe kugirango imyanda yihutirwa hamwe n’imyanda ivu. Ku rundi ruhande, kuri ubu hari imyanda myinshi yuzuye imyanda yuzuye kandi igomba gufungwa. Kubwibyo, mugihe kizaza, geosynthetike izaba ifite amahirwe menshi yisoko muguhagarika ikwirakwizwa ry’imyanda ikomeye ndetse no gukwirakwiza by'agateganyo imyanda ikorerwa.
Icyitwa igifuniko cyo gufunga bivuze ko mugihe imyanda yuzuye yuzuye imyanda yuzuye, hagomba kubakwa urwego rwibanze rutwikiriye kugirango hirindwe amazi yimvura na gaze y’imyanda, kandi ibimera bishobora guterwa kugirango bibe byiza kandi bisubizwe. Hariho ubwoko butatu bwingenzi bwibikoresho bya geosintetike bikoreshwa mugipfundikizo cyumurima: geomembrane yubucucike buke bwa polyethylene (LDPE), igipangu kitagira amazi ya bentonite hamwe nurushundura rwamazi. Muri byo, LDPE geomembrane ifite ihindagurika ryiza, ntabwo byoroshye gutanyagurwa, kandi irashobora kugira uruhare runini mukurwanya kwangiza no gufunga ikirere. Kurwanya anti-seepage barrière ya bentonite yamazi adafite amazi nayo ni meza cyane. Ugereranije na geomembrane, ntabwo izaca burundu imyuka y'amazi munsi y'urwego rutwikiriye, ibyo bikaba bifasha cyane gukura kw'ibimera.
Gukwirakwiza by'agateganyo imyanda ikorerwa muri serivisi ni ugupfukirana imyanda igaragara hamwe na geosynetike mu bice bitarimo imyanda by'agateganyo kugira ngo amazi y’imvura yinjire hamwe na gaze yuzuye. Igifuniko cy'agateganyo nacyo gikunze gukoreshwa mu mishinga yo gutunganya umwanda kugirango hirindwe imyuka yangiza ihindagurika mu kirere. Mu minsi ya mbere, tarpauline, firime, nibindi byakoreshwaga mugukwirakwiza by'agateganyo, ariko ibibazo nka anti-seepage hamwe ningaruka zo gufunga ikirere no gutanyagura byoroshye gusudira byakunze kugaragara. Kugeza ubu, imyanda ifite byinshi kandi bisabwa hejuru y’imyanda ifunze. Imyanda imwe ikoresha 1mm yuburebure bwa HDPE geomembrane kugirango ikingirwe byigihe gito. Ingaruka zo gufunga ni nziza.
Igihe cyo kohereza: Werurwe-03-2022