concern also with the dwindling fish numbers they provide the livelihood of many here but profits have dropped by more than fifty percent in recent years and a series of causes is worsening erosion on the coast. said mia airport but really there's reduced sediment flow from the boat to reverse a result of dam construction and the reduced sediment is a factor sadly illegal sand mining from beaches for construction purposes can also contribute and thirdly climate change studies show that sea levels are rising by about three millimeters per year that's quite high and expected to rise these olita the flooding of vulnerable areas. of it further east in the quetta region attempts are being made to halt the erosion using mangroves already with some success. these mangroves if you find them in these course. of course that protection because their