Cov ntaub qhwv tsis-ntaub yog ib yam tshiab ntawm cov khoom siv npog nrog cov huab cua zoo permeability, nqus dej noo thiab lub teeb xa hluav taws xob, uas muaj cov haujlwm ntawm rwb thaiv tsev txias, huab cua tsis kam, tiv tshav ntuj thiab lwm yam. Piv nrog cov ntaub npuag, nws muaj qhov zoo ntawm cov khoom lag luam siab, kev ua haujlwm ceev ceev, tus nqi qis thiab kev tsim khoom ntau. Yooj yim siv thiab cia. Yog li dab tsi yog cov thov tshwj xeeb ntawm cov ntaub qhwv tsis-ntaub?
1. Kev lag luam ntim: lub hnab khw, lub hnab ntim khoom, hnab tshuaj yej, hnab ntim khoom, cov khoom siv ntim khoom, cov khoom ntim khoom muag, thiab lwm yam.
2. Kev ua liaj ua teb: zaj duab xis ua liaj ua teb, daim ntaub tiv thaiv kev cog qoob loo, yauv tseb cov ntaub, cov ntaub npog dej, cov ntaub thaiv rwb thaiv tsev, thiab lwm yam.
3. Kev lag luam: cov ntaub vov dej tsis muaj ntaub, geotextile, cov khoom siv lim, cov khoom siv rwb thaiv tsev, npog daim ntaub, thiab lwm yam.
4. Lub neej: ntaub thiab ntaub thaiv, ntaub pua rooj, khoom siv hauv tsev npog cov ntaub, npog npog, thiab lwm yam.
5. Kho mob: cov khoom lag luam zoo nkauj, ntaub so tes, ntaub qhwv kom huv, npog ntsej muag, khaub ncaws ua haujlwm, tiv thaiv khaub ncaws, hnab ntim khoom, cov phuam da dej, cov ntaub qhwv lub cev, cov ntaub so, cov phuam ntub, cov phuam ntxuav muag, ntaub so mos thiab lwm yam.
6. Kev lag luam tsheb: tsheb sab hauv, npog tsheb saib xyuas, lub ncoo npog, thiab lwm yam.