干旱区生态环境知识资源中心(Arid): Soil aggregate stability and its response to overland runoff-sediment transport in karst peak-cluster depressions

Arid

DOI	10.1016/j.jhydrol.2023.129437
	Soil aggregate stability and its response to overland runoff-sediment transport in karst peak-cluster depressions
	Wang, Jinyue; Wei, Hui; Huang, Juan; He, Tieguang; Deng, Yusong
通讯作者	Deng, YS
来源期刊	JOURNAL OF HYDROLOGY
ISSN	0022-1694
EISSN	1879-2707
出版年	2023
卷号	620
英文摘要	Karst peak-cluster depressions are ecologically fragile, and slope runoff is a cause of severe soil erosions. However, the runoff-sediment pattern and influencing factors of typical lithologies slope erosion are still unclear. This study investigated the soil aggregate stability of limestone and dolomite and their effects on interrill erosion using rainfall tests. The dolomite soil aggregates were smooth with fine, tightly arranged particles. The limestone soil aggregates were rough with regularly shaped flocculent granular bodies. Soil aggregates of limestone had a higher microporosity than that of dolomite. The contents of macroaggregate with a particle size > 0.25 mm (WSA(0.25)) were significantly higher in limestone soils than in dolomite soils (P < 0.05). The mean weight diameter (MWD) trend was consistent with the WSA(0.25) value. The MWD value for forest soil of limestone was the highest among all soil types, 5.65 mm. With the Le Bissonais (LB) method, the MWD values followed the order of limestone > dolomite soils. The organic matter, Ca and Mg contents were highly significantly correlated with the aggregate stability (P < 0.01). During rainfall, the trend for soil runoff rates mainly indicated three stages: 0 similar to 10 min, rapidly increasing; 10 similar to 30 min, fluctuating; and 30 similar to 60 min, essentially stable. The stable runoff rates of limestone soils were lower than that of dolomite soils. At a slope of 10 degrees, the soil loss rate of dolomite forest was 0.16 g/(min center dot m(2)) higher than that of limestone. The sediment concentrations of dolomite soils were higher than those of limestone soils. The sediment aggregates were dominated by macroaggregates. The content of macroaggregates in dolomite soils ranged from 49.54% to 64.84% at 30 min of runoff and ranged from 51.60% to 69.88% in limestone soils. In general, limestone soils experienced less erosion than dolomite soils because of the difference in soil aggregate stability. The results of this study could provide a theoretical reference for karst rocky desertification management and ecological restoration.
英文关键词	Karst Peak-cluster depressions Limestone Dolomite Aggregate stability Soil erosion
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000975639100001
WOS关键词	INTERRILL EROSION ; RAINFALL INTENSITY ; HYDROLOGICAL PROCESSES ; MECHANICAL BREAKDOWN ; NORTHWEST GUANGXI ; WATER REPELLENCY ; RAINDROP-IMPACT ; SPLASH EROSION ; SLOPE GRADIENT ; LAND-USE
WOS类目	Engineering, Civil ; Geosciences, Multidisciplinary ; Water Resources
WOS研究方向	Engineering ; Geology ; Water Resources
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397398
推荐引用方式 GB/T 7714	Wang, Jinyue,Wei, Hui,Huang, Juan,et al. Soil aggregate stability and its response to overland runoff-sediment transport in karst peak-cluster depressions[J],2023,620.
APA	Wang, Jinyue,Wei, Hui,Huang, Juan,He, Tieguang,&Deng, Yusong.(2023).Soil aggregate stability and its response to overland runoff-sediment transport in karst peak-cluster depressions.JOURNAL OF HYDROLOGY,620.
MLA	Wang, Jinyue,et al."Soil aggregate stability and its response to overland runoff-sediment transport in karst peak-cluster depressions".JOURNAL OF HYDROLOGY 620(2023).