The process and characteristics of its river pattern change depend on its unique geologic environment. The hydrologic condition, as a dynamic factor is also restricted by geologic environment.
下荆江河势演变过程及特点是因其所处的特殊地质环境决定的，作为动力因素的水文条件也受地质环境的制约。
It has become an important factor for water resource deterioration that hydrologic system is impacted by farming activities.
农事活动对水文系统的干扰已成为水资源恶化的重要因素。
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