Strengths - High potential for the remediation of physics and organic pollutants [33] [49] [53] . - low running cost, - easy maintenance, - no secondary pollution, - CW can tolerate fluctuations in flow, - sustainably facilitate water recycling and reuse, - Provide favorable habitat for many wetlands organism [47] . | Weakness - Require a large area. - have low hydraulic load and - exhibit intolerance to heavy pollutant loading rate [33] , - Seasonal death and plant diseases - Seasonal variation of the treatment efficiency |
Threats - Continuous input of pollutants can cause an exceedance of the wetland and reduce the system’s ability to perform treatment efficiently. | Opportunities - Use of CW for river treatment is a recent development, therefore, there is yet no consensus on the optimal design of wetland systems, and not much information on their long-term performance. - Need to reinforce the choice of plants species, - Resolve the problem of saturation, - Optimize the treatment to reduce the large area required. |