Modeling the interaction of water resources and value added in the Birjand Plain

Increased use of groundwater resources in arid regions , thereby growing the economy, especially in agriculture , has led to a worsening trend of the aquifer. Thus, a logical and systematic framework for decision- making principles for allocating water resource limit is needed , so as to provide effective and desirable community needs and economic growth will result. This paper uses a conceptual model of the relationship between economic activity in the region of Birjand plain water sources were identified using a systematic approach and the Vensim software environment was simulated . Then, to model different policy packages under six different scenarios were considered and the amount of water volume and rate of value added in alternatives was compared . The results showed that the trend in the state of the economy ( value added) and groundwater resources will worsen. Also, if the water volume does not change and the value added is greater, Also, if the water resources volume does not change and the value added of regional increases. Should initially be invested in non-water based economic activities such as mines and non-water based industries. But it will be realized that while the primary sources of economic activities there are.