Characteristics of the Runoff and Sediment Yield of Sloping Farmland in the Purple Soil Area Under Different Rainfall Patterns

MA Xing1; ZHENG Jiangkun1; WANG Wenwu1; CHEN Xin2; QIN Wei3; 4

doi:10.13870/j.cnki.stbcxb.2017.02.004

您当前的位置：

首页 >

文章列表页 >

Characteristics of the Runoff and Sediment Yield of Sloping Farmland in the Purple Soil Area Under Different Rainfall Patterns

更新时间：2024-11-07

- Characteristics of the Runoff and Sediment Yield of Sloping Farmland in the Purple Soil Area Under Different Rainfall Patterns
- Vol. 31, Issue 2, Pages: 17-21(2017)
- 作者机构：
  
  1. 四川农业大学水土保持与荒漠化防治四川省高校重点实验室,成都,611130
  2. 遂宁水土保持试验站,四川,遂宁,629006
  3. 中国水利水电科学研究院流域水循环模拟与调控国家重点实验室,北京,100048
  4. 水利部水土保持生态工程技术研究中心,北京,100048
- 作者简介：
- 基金信息：
- DOI：10.13870/j.cnki.stbcxb.2017.02.004
  CLC： S157.1
- Published：2017
- 稿件说明：
移动端阅览
MA Xing1, ZHENG Jiangkun1, WANG Wenwu1, et al. Characteristics of the Runoff and Sediment Yield of Sloping Farmland in the Purple Soil Area Under Different Rainfall Patterns[J]. 2017, 31(2): 17-21.
DOI：

MA Xing1, ZHENG Jiangkun1, WANG Wenwu1, et al. Characteristics of the Runoff and Sediment Yield of Sloping Farmland in the Purple Soil Area Under Different Rainfall Patterns[J]. 2017, 31(2): 17-21. DOI： 10.13870/j.cnki.stbcxb.2017.02.004.

摘要

利用遂宁水土保持试验站5个径流小区1984—2015年次降雨和径流输沙数据，基于降雨过程定量划分出4种雨型，分析了雨型对不同坡度坡耕地产流产沙的作用。结果表明：径流深与各时段最大雨强均呈极显著相关（p＜0.01），随着坡度的增加，最大相关系数所对应的雨强时段越短；冲刷量均与I平均呈极显著相关，且相关系数最大。径流深、冲刷量与雨强拟合关系均为幂函数，分别为“凸型”和“凹型”增函数，且拟合度区间分别为[0.79，0.88]和[0.90，0.97]，说明冲刷量和雨强的关系更密切。各雨型下的产流产沙量随坡度的增大而增大，同一坡度下基本表现为雨型Ⅳ（短历时、大雨强）＞雨型Ⅲ（中历时、中雨强）＞雨型Ⅱ（长历时、中雨强）＞雨型Ⅰ（长历时、小雨强），其中，雨型Ⅳ明显大于雨型Ⅰ且达到显著水平(p＜0.05)，且在15°小区的响应最为明显。雨型Ⅳ是造成该区坡耕地水土流失的主要降雨类型，且径流深和冲刷量随坡度的增大而增加，故应在水土保持工作中着重采取措施进行防治。

Abstract

Based on the data of individual rainfall

runoff and sediment yield of five runoff plots from 1984 to 2015 in Suining Soil and Water Conservation Experimental Station

68 rain processes were classified into four rainfall patterns. The effects of rainfall patterns on runoff and sediment yield of sloping farmland were analyzed for different slopes. Then the results showed that there were highly significant correlations between runoff depths and rainfall intensities of different periods (p＜0.01). With the slope gradient increasing

the period of rainfall intensity for the greatest correlation coefficient became shorter. The amount of sediment was significantly correlated with the average rainfall intensity during each individual rainfall

and the correlation coefficient was maximum. The fitting curve between runoff depth

the amount of sediment

and rainfall intensity was an increasing function of convex and concave shape

of which interval was between 0.79 and 0.88

and 0.90 and 0.97

respectively. It was indicated that the correlation between sediment yield and rainfall intensity was more affinitive than that between runoff depth and rainfall intensity. With the slope gradient increasing

runoff and soil erosion became greater. At the same slope gradient

the yields of sediment and runoff of rainfall IV (short duration

heavy rainfall) was the biggest

followed by rainfall Ⅲ (moderate duration

moderate intensity)

rainfall II (long duration

moderate intensity)

and rainfall I (long duration

light intensity). Furthermore

the difference between rainfall IV and rainfall I was significant (p＜0.05). When the slope gradient was about 15°

the effects of rainfall pattern were the most obvious. Overall

runoff and sediment yield increased with increasing slope gradient. Rainfall IV was the main pattern of rainfall causing soil erosion. In the future

we should take some measures of soil and water conservation to reduce soil erosion caused by rainfall IV on sloping farmland.

关键词

Keywords

references

Views

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Effects of Hedgerows on Runoff and Sediment Yield and Microtopography on Purple Soil Sloping Farmland

Characteristics of Rainfall Runoff and Hydrological Dynamics on the Erosive Weathered Granite Slope

Effects of Slope Gradient and Rainfall Intensity on Nitrogen Loss Under Artificial Simulated Rainfall

Experimental Study on Sheet Flow Resistance Coefficient of Grassland in Loess Area

Effect of Rainfall Intensity and Slope Gradient on Runoff and Sediment Yield on the Red Soil Slope Nested Gravel-sand

Related Author

MA Xing1

WANG Wenwu1

ZHENG Jiangkun1

DENG Longzhou

ZHANG Liping

WU Yanhong

FAN Xiaojuan

SUN Tianyu

Related Institution

Key Laboratory of Soil and Water Conservation & Desertification Combating of Colleges and Universities, Sichuan Agricultural University

State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research

Institute of Soil and Water Resources and Environment, Zhejiang Key Laboratory of Agricultural Resources and Environment, College of Environmental and Resource Sciences of Zhejiang University

Institute of Soil and Water and Environmental Sciences, Zhejiang Key Laboratory of Agricultural Resources and Environment, College of Environment and Resource Science of Zhejiang University

State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Institute of Soil and Water Conservation, Northwest A&F University, Yangling

⁰