XU Lu, ZHANG Dan, XIANG Yuguo, et al. Response of Soil Moisture to Rainfall in Sloping Farmland with Purple Soil in the Seasonal Arid Area[J]. 2020, 34(6): 37-45.
DOI:
XU Lu, ZHANG Dan, XIANG Yuguo, et al. Response of Soil Moisture to Rainfall in Sloping Farmland with Purple Soil in the Seasonal Arid Area[J]. 2020, 34(6): 37-45. DOI: 10.13870/j.cnki.stbcxb.2020.06.006.
Response of Soil Moisture to Rainfall in Sloping Farmland with Purple Soil in the Seasonal Arid Area
Taking the purple soil sloping farmland in the seasonal arid area of the lower Jinsha river as the research object
the PR2/6 soil profile moisture analyzer and tipping rain gauge were used to continuously observe the soil moisture content of 0—100 cm soil layers and rainfall during the rainy season
and the purple soil moisture dynamics and its response to rainfall were analyzed. The results showed that there was a significant difference in the monthly average soil moisture content. The soil moisture content of 0—20 cm was as follows: September > August≈July > June
showing an increasing trend throughout the rainy season. The amount of rainfall was the major factor affecting the depth of water supply in soil. Light rain (6.4 mm) only affected soil moisture content above 10 cm
which increased 12.35%; moderate rain (23 mm) affected soil moisture content above 30 cm
and 10
20
and 30 cm increased by 21.16%
17.77% and 8.22% respectively; heavy rain (49 mm and 112 mm) affected soil moisture above 60 cm
49 mm increased by 7.18%~31.12%
112 mm increased by 34.12%~49.18%. The increased amount of soil moisture in 0—40 cm was significantly correlated with the amount of rainfall and rainfall duration at the level of 0.01; meanwhile
the increased amount of soil moisture in 0—20 cm soil layers was significantly negatively correlated with the drought interval at the level of 0.05; the increased amount of soil moisture in 30—40 cm was significantly correlated with the accumulated rainfall in the previous 3 days. More than 70% of the soil water of purple soil was stored in 60 cm and 100 cm soil layers
accounting for 15.82% and 58.39% of the total soil water storage
respectively. The respond of soil water storage in different soil layers to rainfall was different. The soil water storage of 0—30 cm changed the most in June
the soil water storage of 60—100 cm was relatively stable
while the soil water storage of 60—100 cm changed more than that of 0—30 cm from July to September.
关键词
Keywords
references
Yang L, Chen L D, Wei W, et al. Comparison of deep soil moisture in two re-vegetation watersheds in semi-arid regions[J].Journal of Hydrology,2014,513(1):314-321.
Leitinger G, Tasser E, Newesely C, et al. Seasonal dynamics of surface runoff in mountain grassland ecosystems differing in land use[J].Journal of Hydrology,2010,385:95-104.
Tayfur G, Zucco G, Brocca L, et al. Coupling soil moisture and precipitation observations for predicting hourly runoff at small catchment scale[J].Journal of Hydrology,2014,510:363-371.
Van Verseveld W J, Mcdonnell J J, Lajtha K, et al. A mechanistic assessment of nutrient flushing at the catchment scale[J].Journal of Hydrology,2008, 358(3):268-287.
Ojha R, Morbidelli R, Saltalippi C, et al. Scaling of surface soil moisture over heterogeneous fields subjected to a single rainfall event[J].Journal of Hydrology,2014,516:21-36.
He Z B, Zhao W Z, Liu H, et al. The response of soil moisture to rainfall event size in subalpine grassland and meadows in a semi-arid mountain range:A case study in northwestern China's Qilian Mountains[J].Journal of Hydrology,2012,420/421:183-190.
Jia J B, Yu X X, Li Y T. Response of forestland soil water content to heavy rainfall on Beijing Mountain, northern China[J].Journal of Forestry Research,2016,27(3):541-550.
Reynolds J F, Kemp P R, Ogle K, et al. Modifying the ‘pulse-reserve’ paradigm for deserts of North America:Precipitation pulses, soil water, and plant responses[J].Oecologia,2004,141(2):194-210.
Effects of Rainfall on Soil Water and Nitrogen Change Characteristics Under Different Land Uses
Influence of Stem Diameter of Hedgerow-Grass Ditch System on Sediment Particle Size and Nitrogen and Phosphorus Transport in Purple Soil Areas under Simulated Rainfall
Effects of Continuous Rainfall and Runoff under Different Slope Conditions on Hillslope Soil Erosion in the Black Soil Region
Influence of Grass Coverage, Rain Intensity and Slope on Sediment Concentration of Runoff on Loess Slope
Effects of
Related Author
YANG Cuiping
TUO Yunfei
ZHANG Dao
MA Jimin
WU Yaozhong
HE Yanzheng
LI Tianyang
LI Yonghao
Related Institution
Ecology and Environment Department in Southwest Forestry University
Water Resources Bureau, Jinning District
College of Resources and Environment, Southwest University
Key Laboratory of Ecological Environment in the Three Gorges Reservoir Area of Ministry of Education, School of Life Sciences, Southwest University
College of Resources and Environment, Jilin Agricultural University