【摘要】 <正> 研究方法概述 本研究运用系统工程的理论和方法,进行设计和研究。将流域区的水体(包括水、悬浮物、水生生物、沉积物)地下水、土壤、岩石、降雨和地表迳流作为一个大自然系统;从布更多还原

【Abstract】 This paper introduces background levels of the elements that exist in water, suspended substances, deposits and aquatic organisms in the Dongting Lake. The geochemical characteristics of the background levels, of which many factors influence, such as rocks, soil, human activities, water chemistry, geomorphic features, groundwater, rainfall, surface runoff, hydrographic parameters etc, have been studied. The paper also briefly introduces the methodology of the study on water environmental background and the relevant factors.更多还原