Here are updated photos as of last weekend, April 24, 2016.
Earlier photos are posted in Terraces Beside Narra Trees, May 10, 2015.
Before and after we cleared the dried leaves; also repaired the misaligned stones.
And we added a new, 2nd layer of stones and small rocks on the main barrier. Remember that this used to be a small waterway, now totally blocked by a wide layer of stones to control soil erosion and minimize flash flooding. Some of flash flood water will be temporarily impounded by this structure, the excess water will simply overflow above the stones, or between these stones.
A thick layer of new and old leaves were deposited behind these stones. They won't go down the creek anymore, they will decompose there, to become new rich and organic top soil within weeks.
The cleared areas of dried leaves. Some small and young trees that are too close to each other were also removed.
Clearing thick dried leaves in a wide area also discourage some large creepers and crawlers like snakes from staying in the area as they have little cover.