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- Title
Quantifying farmland shelterbelt impacts on catchment soil erosion and sediment yield for the black soil region, northeastern China.
- Authors
Fang, Haiyan; Aitkenhead, Matt
- Abstract
As one part of the 'Three Norths' forest protection system, dense farmland shelterbelt networks in northeastern China could greatly modify water and sediment flows. In this paper, catchment soil erosion rate and sediment yield (SY) that are impacted by farmland shelterbelts were estimated using WaTEM/SEDEM model. The shelterbelts reduced catchment soil erosion and SY to some extent. The mean soil erosion rate and specific sediment yield (SSY; defined as the ratio of SY to catchment area; t km−2 yr−1) of the 25 reservoir catchments decreased from 351.6 and 93.9 t km−2 yr−1 under the supposed scenario without shelterbelts to 331.1 t km−2 yr−1 and 86.3% t km−2 yr−1 under the current situation with shelterbelts. The sediment trap efficiencies (STEs) varied from 0.01% to 23.6% with an average value of 7.6%. The STEs were significantly correlated with shelterbelt density, catchment perimeter, topographic factors, RUSLEP‐factor and land use patterns including patch density (PD), patch cohesion index (COHESION), Shannon's diversity index (SHDI) and aggregation index (AI). The multiple regression equation involving factors of catchment's topography and morphology and land use pattern has a satisfactory performance, and mean slope gradient (MSG) and AI explained most of the variability of shelterbelts' STE. This information can help land managers to better design shelterbelts and to reduce water‐derived soil loss at catchment scale.
- Subjects
CHINA; SOIL erosion; BLACK cotton soil; FOREST protection; SEDIMENTS; HYDRAULICS; WATERSHEDS
- Publication
Soil Use & Management, 2021, Vol 37, Issue 1, p181
- ISSN
0266-0032
- Publication type
Article
- DOI
10.1111/sum.12591