Longer-lasting droughts and floods may result from increased precipitation variability and more severe weather events brought on by climate change. Enhancing subterranean water storage is a workable solution to address this issue and improve both climate change adaptation and freshwater supply. Artificial groundwater recharge, which is the process of increasing the quantity of water that enters an aquifer by human-controlled means, is a technique for boosting subsurface storage. By infiltrating into the soil and percolating surface water through it, this method will purify and increase the quality of the water. According to research by Water in the West, state grants in the United States have funded groundwater recharge and storage projects to the tune of an estimated $1.15 billion (in 2014 dollars).

G-CANS, Metropolitan Area Outer Underground Discharge Channel, is a drainage tunnel system to prevent flooding by typhoons and heavy rain in Tokyo. The main tank can store 240,000 tons of rainwater and discharge 200 tons of rainwater per second into the surrounding rivers through high-performance pumps. The Underground Discharge Channel is very effective in large cities with high concrete pavement ratios and difficulty creating reservoirs and has been established in other large cities such as Seoul. In addition, unlike direct drainage, which is too expensive, the cost is reduced because the central tank stores excessive rainwater.

Porous concrete is a lightweight insulating concrete made by putting gas in concrete to maintain a porosity of 15 to 30% and aims to flow water through the voids. In general, concrete minimizes holes to secure strength, so drainage is not achieved at all. Porous concrete is an environmentally friendly material where openings for drainage are blocked, and vegetation can grow in the gaps. In particular, a concrete product called Topmix has a performance that can drain 600 liters per minute per square meter. Unlike manholes and drains, the drainage through porous concrete has a significantly lower rate of clogging due to waste and many alternative channels for water flow.

Afforestation is the process of converting a devastating land into a forest through planting. This method is still one of the best ways to deal with climate change, especially when it is made to rely on renewable energy. Afforestation is frequently utilized as a river management strategy. Trees are planted on barren lands to support the soils and banks of rivers. Furthermore, the trees create additional habitats for wildlife and contribute to the reduction of surface runoff by better collecting precipitation before it enters river channels.

The Chinese government stated plans in 2018 to cover 7 million hectares, or 23 percent, of the country with forests by 2020.

We have to...

1. Utilize our own bottle or cup to reduce using of disposable cups.

2. Decrease using of 1-day shipping for less emission of carbon dioxide from trucks.

3. save our electricity by turning off the light in the empty room

4. walk or bike on a normal day

5. Plant any flowers or trees.