水保所知识产出(1956---)知识库

The Loess Hilly–Gully region (LHGR) is the most serious soil erosion area in the world.
For the small watershed with high management in this area, the scientific problem that has been paid
attention to in recent years is the impact of the land consolidation project on the erosion environment
in the gully region. In this study, the 3D simulation method of vegetation, eroded sediment and pol-
lutant transport was innovated based on the principles of erosion sediment dynamics and similarity
theory, and the impacts of GLCP were analyzed on the erosion environment at different scales. The
verification results show that the design method and the scale conversion relationship (geometric
scale: λ l = 100) were reasonable and could simulate the transport process on the complex underlying
surface of a small watershed. Compared with untreated watersheds, a significant change was the
current flood peak lagging behind the sediment peak. There were two important critical values of
GLCP impact on the erosion environment. The erosion transport in HMSW had no change when the
proportion was less than 0.85%, and increased obviously when it was greater than 3.3%. The above
results have important theoretical and practical significance for watershed simulation and land-use
management in HMSW.