水土保持学报2018，Vol.32Issue(1)：32-38,7.DOI:10.13870/j.cnki.stbcxb.2018.01.006
湘北红壤低山丘陵区典型水土流失治理模式径流泥沙效应
Effects of Typical Soil and Water Loss Control Patterns on Runoff and Sediment of Red Soil in Low Hilly Areas from the Northern Hunan Province
摘要
Abstract
Clarifying the runoff and sediment in runoff plot under different soil and water loss control patterns plays an important role for large-scale soil and water loss.In this study,the runoff and sediment of red soil under three typical soil and water loss control patterns (S1 pattern:Slope change ladder-Fruit trees,S2 pattern:Contour trench and ridge + Crops,S3 pattern:Flat waste land slope + Herbs) were investigated through the field standard runoff areas under natural rainfall experiment in low hilly areas.The results showed that the average runoff volume under three control patterns was S3 (1.84 m3) ＞ S1 (1.03 m3) ＞ S2 pattern (0.78 m3),and the average sediment yield was S3 (1.191 t/hm2) ＞ S1 (0.411 t/hm2) ＞ S2 pattern (0.311 t/hm2).The cumulative runoff under the three control patterns was S3 (33.19,15.25,14.13 m3) ＞ S1 (19.40,9.06,6.48 m3) ＞ S2 pattern (16.60,5.89,4.15 m3) in the A,B,and C rainfall types (K-means clustering).The cumulative sediment also showed the similar trend that was S3 (14.474,10.863,15.153 t/hm2) ＞ S1 (7.521,2.695,3.766 t/hm2) ＞ S2 pattern (6.149,1.685,2.741t/hm2).Different control patterns maintained a significant positive correlation between sediment yield had significant positive correlations with runoff volume under the tree control patterns (P＜0.01,r ＞ 0).The correlation coefficient (r) was 0.853,0.920,and 0.677,respectively.Furthermore,the linear regression slope (k) of sediment yield and runoff volume was 0.356,0.420 and 0.493,respectively under S1,S2,and S3 patterns,indicating the response degree of sediment to runoff in different control patterns was S3 ＞ S2 ＞ S1 pattern.Thus,three typical patterns have significantly different effects for controlling soil and water loss.关键词
治理模式/径流/泥沙/径流小区/降雨Key words
control pattern/runoff/sediment/runoff plot/rainfall分类
农业科技引用本文复制引用
宋江平,李忠武,刘春,王丹阳,陈佳,彭浩,肖海兵,郭俊军..湘北红壤低山丘陵区典型水土流失治理模式径流泥沙效应[J].水土保持学报,2018,32(1):32-38,7.基金项目
国家重点研发计划项目(2017YFC0505401) （2017YFC0505401）
湖南省水利科技项目(湘水科计[2016]194-38) （湘水科计[2016]194-38）
