Land use, runoff, erosion and their control: a review for southern China

Sediment Reallocations due to Erosive Rainfall Events in the Three Gorges Reservoir Area, Central China

“…Nevertheless, the spatial results of the presented modelling approach are in agreement with data on average soil loss rates of main land use types in southern China (Hill & Peart, 1998;Huang et al, 1998;Xiang et al, 2001;Gao et al, 2004;Zheng & Zhang, 2006;Guo et al, 2015). The data are based on plot-scale studies, from which an average soil loss rate of 0.38 Mg ha À1 a À1 for the land use type 'forest', 5.5 Mg ha À1 a À1 for 'grassland' and 35.4 t ha À1 a À1 for 'cropland' were identified.…”

“…The data are based on plot-scale studies, from which an average soil loss rate of 0.38 Mg ha À1 a À1 for the land use type 'forest', 5.5 Mg ha À1 a À1 for 'grassland' and 35.4 t ha À1 a À1 for 'cropland' were identified. According to a review of Hill & Peart (1998), average soil loss in southern China amounts to 0.1 Mg ha À1 a À1 for 'forest', 2.4 Mg ha À1 a À1 for 'grassland' and 62.4 Mg ha À1 a À1 for 'cropland'. In the present study, we found erosion on the land use classes 'cornrapeseed' and 'potato-cabbage', while both land use classes were classified as 'severe'(>50 Mg ha À1 ) for approximately one third of the specific land use area (Table IV).…”

Expanding Rubber Plantations in Southern China: Evidence for Hydrological Impacts

“…Greater rates for these processes were observed under rubber trees planted on steeper slopes in an experimental site nearby the study area [45]. Similarly, a lower soil infiltration capacity is observed where grassland forms on eroded soils [46], as observed in the study area. Although terracing practiced on steep hillslopes under rubber plantations aims to promote runoff infiltration, in some instances such interventions led to soil compaction, reducing soil permeability and ultimately leading to increased runoff [16].…”

Shifts in stream hydrochemistry in responses to typhoon and non-typhoon precipitation

“…Changes in relatively contributions of different sources of water (or old water relative to new water) on stream discharge play a key role in regulating ion concentrations during a storm and between periods of different flow rates (Elwood and Turner, 1989;Giusti and Neal, 1993;Bishop et al, 2004). Among the three sources, groundwater is enriched with ions derived from rock weathering such as K + , Ca 2+ , and Mg 2+ , pre-storm subsurface runoff has a longer contact time with soils that are also rich in these cations and SO 2− 4 , and sur-face runoff largely reflects precipitation chemistry.…”