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一、灌区土壤次生盐碱化的演变及特点人民胜利渠灌区大部属黄河冲积平原。按地貌可分成三区:古黄河废堤(俗称古阳堤)南为古黄河漫滩区,堤北为背河洼地区,新焦铁路至卫河一带为卫河冲积区。(见图1)灌区土壤多为中壤和轻壤,局部地区有沙土和粘土。灌区属暖温带大陆性季风型气候,多年平均降雨量640毫米,其中60～70％集中在7、8、9三个月,蒸发量1400毫米。
I. The evolution and characteristics of secondary salinization of soil in irrigated area Most of the tributaries of the tributaries of the tributaries of the Quang Tribe belong to the Yellow River alluvial plain. According to the landscape can be divided into three areas: the ancient Yellow River embankment (commonly known as the ancient embankment) south of the Yellow River floodplain area, embankment for the Beijiao depression area, the new focal railway to Weihe area Wei River alluvial area. (See Figure 1) Irrigated soil mostly mid-soil and light soil, some areas have sand and clay. Irrigation is a warm temperate continental monsoon climate, the average annual rainfall 640 mm, of which 60 to 70% concentrated in 7,8,9 three months, the evaporation of 1400 mm.