天然降雨条件下巧鸟径流监测小区水土及养分流失特征分析  

Characteristics of Soil and Water loss,Nutrient Loss in Qiaoniao Runoff Monitoring District under Natural Rainfall Condition

作　　者：蒋亦工 JIANG Yi-gong(Liaoning Provincial Water Resources Management Group, Tieling 112003, China)

机构地区：[1]辽宁省水资源管理集团,辽宁铁岭112003

出　　处：《黑龙江水利科技》2022年第5期59-64,68,共7页Heilongjiang Hydraulic Science and Technology

摘　　要：文章以锦州市巧鸟径流场为例,分析了草地、林地、耕地3种小区2019-2020年天然降雨时间下的水土及养分流失特征。研究表明:降雨强度、降雨量、坡度与各小区的水土及养分流失量均存在正相关关系,降雨-径流(泥沙)回归方程可用于后期产流、产沙量估算预测,其相关性R2>0.85;不同土地利用类型下林地<草地<耕地的水土及养分流失量,不同形态养分具有相似的流失趋势特征,在总磷和总氮中正磷、硝氮的流失占比最大,氮素的流失量远<氮素;降雨对养分流失的影响最大,其次为泥沙,径流的影响最小,产沙量、径流量、降雨量与磷素流失程度之间的相关性高于氮素。Taking the Qiaoniao runoff field in Jinzhou city as an example,the characteristics of soil and water loss and nutrient loss under natural rainfall time from 2019 to 2020 in three plots of grassland and woodland were analyzed in this paper.The results show that there is a positive correlation between rainfall intensity,rainfall,slope and soil and water loss and nutrient loss in each plot,the rain-runoff(sediment)regression equation can be used to estimate runoff and sediment yield in the later period,and the correlation is R2>0.85;for the water and soil loss and nutrient loss of different land use types,the forest land<the grass<the cultivated land,showing that different forms of nutrients had similar loss trend characteristics,and in total phosphorus and total nitrogen,the loss of normal phosphorus and nitrate was the largest,and the loss of nitrogen was far less than that of nitrogen.Rainfall had the greatest effect on nutrient loss,followed by sediment and runoff,having the least effect.The correlation between sediment yield and runoff rainfall and phosphorus loss was higher than that of nitrogen.

关 键 词：巧鸟小区 径流监测 天然降雨 产流产沙 养分流失 

分 类 号：S157.2[农业科学—土壤学]