Ecological water requirement estimation of the rump lake in an extreme arid region of East Juyanhai

With population growth, industrialization and expansion of irrigated agriculture, in some areas over-exploitation of lake resources, and disruption of the balance of lake ecosystems, have caused problems within lakes such as drying, shrinkage and serious water pollution. Therefore, it is critical to maintain the balance of lake ecosystems. In this paper taking East Juyanhai as the study area we use remote sensing technology and visual interpretation of ETM images of the lake area, and extract data for each month from 2002 to 2012. This research can provide the basis for rational allocation of Heihe River Basin's water resources. According to the results on ecological water requirements at different guarantee rates, management schedules for East Juyanhai's water resources must account for the relative proportions of upper, middle and lower runoff to ensure the rational allocation of water resources in the Heihe River Basin. The results of the study are also a valuable reference for the restoration and reconstruction of East Juyanhai's surrounding vegetation.