The Ewa Wetland is not just a low-lying parcel of land—it is one of the most critical natural drainage assets in all of South Kihei. According to the County’s drainage studies and master planning maps, multiple active surface flows and neighborhood runoff patterns converge toward this exact location. In heavy rain events, this site functions as a natural collection basin, receiving stormwater from surrounding streets, gulches, and developed areas.
What makes this wetland especially important is that it operates as a cryptorheic basin—a system where water has no visible surface outlet to the ocean. Instead, collected stormwater gradually infiltrates downward into the groundwater table, where it is naturally filtered and ultimately makes its way to the ocean without causing surface flooding or damage. This is a quiet, invisible process, but it is essential to maintaining balance in Kihei’s coastal environment.
For decades, this natural system has worked. Water flowed into the basin, soaked into the ground, and disappeared safely.
What Has Changed—and Why Flooding Is Getting Worse
Recent storm cleanup activity has unintentionally disrupted this system. Large berms of silt and mud have been piled along the upslope edge of the wetland, forming what is effectively a barrier or dam wall. This artificial buildup is now blocking the very surface flows the wetland was designed—by nature—to receive.
At the same time, major drainage pathways feeding this area are still active. Water is still coming down from the neighborhoods, from mapped flow lines, and from storm events—but now it has nowhere to go.
Instead of entering the wetland:
- Water backs up along South Kihei Road
- Low-lying commercial areas begin to flood
- Locations around Azeka’s, the Post Office, and Yee’s Orchard are increasingly impacted
South Kihei Road itself is now functioning like a catch basin with no outlet, turning into a temporary holding pool during heavy rain events.
A Simple but Urgent Fix
This is not a mystery problem. The cause is visible, and the solution is straightforward.
The wetland must be reconnected to its natural inflow paths.
That means:
- Removing the accumulated silt and mud buildup
- Restoring the original surface flow channels
- Eliminating the artificial berm that is blocking water entry
Once water can again enter the Ewa Wetland as intended, the system can resume its natural function—absorbing and dispersing stormwater safely below ground.
Why This Matters
When natural drainage systems are interrupted, the impacts are immediate and visible—flooded roads, damaged businesses, and unsafe conditions for residents. But when they are restored, the solution is often just as immediate.
The Ewa Wetland is not a problem area—it is part of the solution. Protecting and restoring its function is one of the most effective and environmentally sound ways to reduce flooding in this part of Kihei.
