A model For Determination of Surface And Groundwater Balance Components In Tuyserkan Plain

Plain water balance is one of the most important issues from the view of water resource management and decision-making and planning of natural resources, agriculture and environment aspects. On the other hand, a survey of the water balance due to diversity of input and output components and uncertainties in the estimation of some environmental parameters makes the calculations extremely complex. Simultaneous evaluation of ground and surface water balance due to increases of input and output components in the field and watershed scales can intensify this complexity. The purpose of this study is to introduce a comprehensive and simple water balance equation, including all parameters of ground and surface water balance. In order to be able to analyze the data and determine outputs and inputs of Tuyserkan plain water balance, the data of precipitation and runoff as well as the primary base map data were collected. Initially, ground and surface water balance components were investigated separately, and then a comprehensive and simple formula was introduced to determine the complete plain water balance. The simplicity of the proposed equation is an advantage as the water balance components have been considerably decreased, (6 input components have been decreased to 3, including incoming surface runoff, incoming subsurface flow and precipitation and 5 output components have been decreased to 3, including evapotranspiration, outgoing subsurface flow and outgoing surface runoff).The presented equation seems to be applicable for other plains.