Changing a stream channel can cause flooding and erosion along the stream banks. The use of too many large wells can lower the underground water table. Wells are drilled to recharge underground aquifers. Projects to reuse wastewater might be started. Ecological-designed recharge ponds disperse some storm drainage to artificially recharge shallow aquifers.
Less damage is done to basements, yards, and streets.
Water is actually injected into recharge wells to put water back into underground aquifers. Reusing wastewater means less pollution, more water conservation, and additional water for recharging aquifers.