充分な水を確保するためには？

摘要

We harvest stormwater at a scale that no other city has done. We built a comprehensive drainage infrastructure, comprising 7,000 kilometers of drains, 32 rivers, 17 reservoirs. Today, tivo-lhirds of Singapore has been transformed into water catchments... The Marina Barrage achieves an important function of creating afresh water reservoir within a city, supplying up to 1 /10th of our water requirements. It also serves to manage floods and promote water by creating opportunities for recreational water activities.%我々の国ではほかのどの国でも行っていない規模で雨水を収集しています。我々は排水路7,000km、32の川、貯水池17力所からなる総合的な排水インフラを建造しました。今日では、シンガポールの国土の3分の2が集水用地につくりかえられています。