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第二松花江是松花江水系的主要支流之一,流域面积近八万平方公里。所经之处为一系列迥然不同的自然单元,上游为一以新期火山活动和相应的熔岩堆积地形、侵蚀剥蚀中山、低山为特色的自然景观带;中游以古岩浆活动与其相应的区域变质为主的低山、丘陵为特色的自然景观带;下游以不均匀沉降坳陷为主的平原和低湿地为主的自然景观带。在第二松花江流域,由于受区域自然景观和区域地质作用分带性的控制,地下水的区域环境地球化学特征亦随之呈现出明显的差异。地下水环境地球化学特征在第二松花江流域,由于自然环境(地质、地貌、土壤、植被等)的分带特征而导
The second Songhua River is one of the major tributaries of the Songhua River system. The drainage area covers nearly 80,000 square kilometers. It goes through a series of totally different natural units. The upstream is a natural volcanic zone with the lava accumulation and the corresponding lava accumulation terrain, which erodes the erosion of the middle and lower mountains. In the middle reaches, the paleomagnetic activity and its corresponding area Metamorphic dominated low mountains and hills as the characteristics of the natural landscape zone; the lower reaches of the uneven subsidence-dominated plains and low wetlands dominated the natural landscape belt. In the second Songhua River basin, due to zonal control of regional natural landscape and regional geological effects, the regional environmental geochemical characteristics of groundwater also show obvious differences. Geochemical characteristics of groundwater environment in the second Songhua River basin, due to the natural environment (geology, geomorphology, soil, vegetation, etc.)