河北平原属半干旱性气候,年平均降雨量约500毫米左右,有60%雨量集中在七、八两月,蒸发量为1,800—2,000毫米。河北平原地势低平,河流多为地上河或半地上河,雨季地表径流难以宣泄,并增补地下水源,致在广大相对低洼地区地下径流不暢谡庵智榭鱿?地下水条件成为形成土壤盐渍化的主要因素。即当地下水埋藏较浅,矿化度较高时,地下水及底土中 Hebei Plain is a semi-arid climate with an average annual rainfall of about 500 millimeters. 60% of the rainfall is concentrated in July and August and the amount of evaporation is 1,800-2,000 millimeters. Hebei plain low level, the river is mostly ground river or semi-ground river, rainy season surface runoff is difficult to vent, and add groundwater source, resulting in the majority of relatively low-lying areas of poor runoff  谡 Um ˉ Chi ground squid? Groundwater conditions become the formation of soil salt The main factor of the stain. That the local water buried shallow, high salinity, groundwater and subsoil