Harmony comes from the Greek word “harmonia” which means that it is harmoniously bound. In the field of philosophy, harmony is the cooperation between various factors in such a way these factors can produce an organized unity (Wikipedia).
So, how is the harmoniousness created in an ecosystem related to the coast and watershed?
Simply based on the picture above, harmoniousness will be created if the interaction between irrigate of necessity in the paddy field area and the availability of it in the watershed goes accordingly. Upstream basin, storing water that is stored in the ground from rain then flows it to the middle part of the basin for agricultural activities and the downstream basin for fishing activities. Rice planted in paddy fields in the middle watershed, has a limit of water needs that have to fulfilled in order to be able to grow-flowering-filled to be suitable for harvesting until it is processed into the main food for humans.