A: Because pipe replacement can be done only over one small area at a time-if the area is too large it would paralyze the water supply system-internationally the pipe replacement rate is only 1.5 % per year. Thus improvements in the leakage rate require longterm investment, and it is quite expensive. To get the current average 25 % leakage rate down to 10 % will require NT $ 50-60 billion.
答：由於汰換管線只能採小面積施工，區域太大會癱瘓供水系統，國際上每年平均的汰換率也只有 1.5 %，因此改善漏水需要長時間投入，同時需要花很多錢，估計從目前台灣平均 25 % 的漏水率要降到 10 %，需要五、六百億經費。