枣庄市谷山坡面径流观测场模型因子K值分析

Analysis on Model Factor K of Gushan Slope Runoff Observation Station in Zaozhuang

摘要:

土壤可蚀性因子K值反应土壤对侵蚀的敏感性。枣庄市谷山坡面径流观测场标准径流小区12年来的场次、年度和多年平均实测降雨、径流、泥沙资料数据显示,在相同土壤理化性质及相同水土保持措施条件下,不同降雨条件产生不同的K值;在相同土壤理化性质及相同降雨条件下,不同水土保持措施产生不同的K值。研究发现,枣庄市谷山坡面径流观测场的土壤可蚀性因子K与降雨侵蚀力、土壤流失量、水土保持措施有关。

Abstract:

Soil erodibility K reflects the sensitivity of soil to erosion. Based on 12-year observed data of rainfall, runoff and sediment at standard runoff plots of Gushan Slope Runoff Observation Station in Zaozhuang Municipality, including single-storm, annual and multi-year average values, it is shown that under the same soil physical and chemical properties and the same soil and water conservation measures, different rainfall conditions result in different K values; under the same soil physical and chemical properties and the same rainfall conditions, different soil and water conservation measures lead to different K values. The study reveals that the soil erodibility factor K is correlated with rainfall erosivity, soil loss, as well as soil and water conservation measures at Gushan Slope Runoff Observation Station in Zaozhuang Municipality.