as a result despite very thorough water cooperation agreements among central asian governments the crossborder governance system has more or less come to a standstill allouche huge irrigation systems constructed during the soviet era have overdrawn water to the extent that the aral sea is mostly depleted of its water and is classified as one of the greatest humanmade ecological disasters of the twentieth century libert related salinity and water pollution have human impacts such as a high morbidity in the aral sea region krahenbiihl gely and herren