The paper discusses the concept of agricultural system of oasis ecology indesert,reveals the guiding role of water resources in developing oasisagriculture and the duality of utilizing water resources and puts forward anidea to change the traditional calculation of“water-soil balance”. Also,a modelwith multi-objectives of developing water resources is established so as tokeep good circle in ecological agriculture.
Taking water and soil resources as a whole, this paper makes scientific evaluations to the developmental utilization situation and existing problems of water and soil resources in Hunan province, and then pointed the assumption of further exploitatoin and protection of water and soil resources for the purpose of taking measures suitable to local conditions in light with structure and function of water-soil system, and coordinating relationship between water resources and eco-environment and increase water and soil utilization efficiency by means of rational allotment and distribution.
These councils, which are independent of the state, deal with such matters as rights in water and land and also with succession disputes.
These changes reflect the deterioration of eco-environment and the acceleration of urbanization, and also indicate the problems existing in the arrangement of water and land resources between the upper and lower reaches of the Heihe River.
Irrational utilization of water and land resources results in eco-environmental deterioration in the Tarim River.
The author thinks that mire is a special ecosystem between these two ecosystems, and proposes the new concept that a mire is a natural ecosystem with transitional nature of semi-water and semi-land formed by water and land interaction.
Development strategies of water and land resources in the hexi region, China