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[1]LI Gaoliang,WANG Ke,DUAN Cuihua,et al.Study on Simulation of Soil Water Dynamics in Fish-Scale Pit After Rainfall in Loess Hilly Region[J].Research of Soil and Water Conservation,2022,29(02):76-84+91.

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Study on Simulation of Soil Water Dynamics in Fish-Scale Pit After Rainfall in Loess Hilly Region

Research of Soil and Water Conservation[ISSN 1005-3409/CN 61-1272/P] Volume: 29 Number of periods: 2022 02 Page number: 76-84+91 Column: Public date: 2022-03-20

Title:: Study on Simulation of Soil Water Dynamics in Fish-Scale Pit After Rainfall in Loess Hilly Region

Author(s):: LI Gaoliang^1,3, WANG Ke^2,4, DUAN Cuihua^2,4, ZHENG Jiyong^1,2; (1.Research Center of Soil and Water Conservation and Ecological Environment, Chinese Academy of Sciences and Ministry of Education, Yangling, Shaanxi 712100, China; 2.State Key Laboratory of Soil Erosion and Dryland Farming on the Loess Plateau, Northwest A&F University, Yangling, Shaanxi 712100, China; 3.University of Chinese Academy of Sciences, Beijing 100049, China; 4.College of Natural Resources and Environment, Northwest A&F University, Yangling, Shaanxi 712100, China)

Keywords:: fish-scale pit; soil moisture redistribution; irrigation experiment; loess hilly region

CLC:: S152.7

DOI:: -

Abstract:: In order to understand the effects of fish-scale pit on soil water dynamics after rainfall, the irrigation experiment was carried out. The size of fish-scale pit was 60 cm × 40 cm × 10 cm(length × wide × depth), the rainfall intensity was 60 mm/h and 30 mm/h and it lasted for 1 h. The runoff collection area was 2 m², and the runoff coefficient was 0.3. The results showed that:(1)the vertical infiltration depth was 60 cm and 50 cm, repecttively, on the first day after irrigation that the rainfall intensity was 60, 30 mm/h,the maximum vertical infiltration depth was 80 cm and 60 cm on the second day after irrigation; the maximum vertical infiltration depth increased with the increase of rainfall intensity; the maximum horizontal infiltration distance was 40 cm on the first day after irrigation; the horizontal infiltration distance decreased with the increases of soil depth;(2)the water was mainly stored at the depth of 10—80 cm and 0—40 cm from the center of the fish-scale pit within 7 days after irrigation that the rainfall intensity was 60 mm/h; the water was mainly stored at the depth of 10—50 cm and 0—40 cm from the center of the fish-scale pit within 7 days after irrigation that the rainfall intensity was 30 mm/h;(3)the soil moisture reached the maximum at depths of 10—30 cm and 30—50 cm on the first and the third day after irrigation, respectively; the soil moisture at a distance of 0—20 cm from the center of fish-scale pit reached the maximum on the first day after irrigation; the soil moisture at a distance of 20—40 cm reached the maximum on the second day or the third day after irrigation. The soil water content gradually decreased and reached to the stable level after reaching the maximum. The water infiltration depth in the fish-scale pit could be 80 cm, and increases with the increase of rainfall intensity. There is no obvious relationship between the horizontal infiltration range and rainfall intensity.

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Last Update: 2022-04-20