Read the passage below carefully:
[Paragraph 1] Across the semi-arid regions of East Africa, seasonal streams remain dry for most of the year, creating acute water scarcity for farming communities. To address this, rural cooperatives have increasingly adopted sand dams—reinforced concrete walls built across seasonal riverbeds. As rain falls, sand accumulates behind the wall, trapping up to forty percent of the floodwater beneath the sand surface. This natural filtration prevents evaporation and keeps water accessible throughout dry seasons.
[Paragraph 2] While the engineering behind sand dams is relatively simple, their long-term survival depends almost entirely on community governance. Successful projects require local committees to regulate water abstraction, enforce maintenance routines, and resolve conflicts over usage rights. Without active local oversight and shared responsibility, the physical infrastructure quickly degrades or becomes monopolized by powerful local interests.
[Paragraph 3] Beyond basic survival, securing a steady water source transforms the local economy. Women and children spend significantly fewer hours fetching water, allowing for higher school attendance and entrepreneurial ventures. Furthermore, nearby land stays fertile longer, enabling farmers to cultivate high-value off-season crops and diversify their income streams.
Based on the passage, match each paragraph to the statement that best captures its central argument.
- Paragraph 1Sand dams provide a low-tech, effective mechanism for storing and protecting seasonal water supplies.
- Paragraph 2Community stewardship and regulation are essential for the sustainability and fairness of water projects.
- Paragraph 3Reliable water storage drives broader socio-economic improvement and economic diversification.