Some issues related to soil-groundwater environment research in northern Haihe plain, China

Northern Haihe plain in situated within the semi-arid region of China is still being more and more arid. Proluvio-fluvial plain, fluvial plain, fluvial-marine plain is in deposit sequence from hillside to seashore in northern Haihe plain. The contents of Ca, Mg and F in soil are high, and Se, Mo and I are low. The soil is featured by weak alkaline and is now acidizing. The unconfined groundwater is fresh or fresh-salty and weak alkaline but being basification. Together with natural driving force, artificial driving force has becoming one of the important driving forces to the evolution of soil-groundwater environment, which plays different role in different area. The soil environment is good and the groundwater environment is not good. But both of them are being aggravated.