Singaporean hydrographic designer Zhang Wei Lin claimed D&AD’s Black Pencil for "Monsoon Script," re-engineering 5 km of Orchard Road storm drains into hydrological storytelling systems. Collaborating with PUB Water Authority, laser-etched troughs guide rainwater to form temporary Chinese calligraphy – flow velocity dictates brushstroke thickness while turbidity sensors control ink-black mineral pigment release. Pedestrians wielding magnetized umbrellas divert flows to compose poetic phrases from classical Tang poems on pressure-sensitive tiles. 

Real-time water quality data manifests as changing seal scripts projected onto building facades during downpours. Impact metrics confirm 89% increase in stormwater literacy among residents, while drainage efficiency improved by 40% during monsoon season. Kyoto’s Kamo River now adapts the system with washi paper elements for typhoon education.