Land-use changes and check dams reducing runoff and sediment yield on the Loess Plateau of China

Shi, Peng; Zhang, Yan; Ren, Zongping; Yu, Yang; Li, Peng; Gong, Junfu

doi:10.1016/j.scitotenv.2019.01.430

Cited by 165 publications

(69 citation statements)

References 40 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…Other research [16] shows that the decreasing of farmland may cause runoff reducing. In Dapoling basin, the farmland decreased slightly (from 41.85% to 41.81%), which might have some impact on the variation of runoff.…”

Section: Runoff Depthmentioning

confidence: 95%

“…The hydrologic response to land use change reveals that land use change alters elements such as evapotranspiration [8,9], runoff depth [10,11], mean annual runoff [12][13][14], snowmelt [1,15], soil erosion [16,17] and the groundwater quality [18] to affect overall basin hydrology. It is well documented that land use change therefore can have a significant effect on river basin hydrology, which is mainly reflected on the change of the flood volume [1,9], peak flow discharge [10,13], flood frequency [19] and peak flow rate [20].…”

Section: Introductionmentioning

confidence: 99%

See 1 more Smart Citation

Impact Assessments of Rainfall–Runoff Characteristics Response Based on Land Use Change via Hydrological Simulation

Zhou

Chen

et al. 2019

Water

Self Cite

View full text Add to dashboard Cite

The hydrology response was studied considering the established fact of land use change in Dapoling basin. The whole period was divided into two (1965–1985 and 1986–2012) according to the major land use and land cover change in this region. Xinanjiang model was used to simulate discharge data in the two periods. The hydrologic response to the change could be evaluated by inspecting the response of model parameters and flood elements. The results show that the lag time varied, and the hydrologic elements including the mean runoff depth, flood peak and kurtosis coefficient varied with the rainfall depth. This result is significant for studying the response of runoff characteristic from land use and land cover change.

show abstract

Section: Runoff Depthmentioning

confidence: 95%

Section: Introductionmentioning

confidence: 99%

Impact Assessments of Rainfall–Runoff Characteristics Response Based on Land Use Change via Hydrological Simulation

Zhou

Chen

et al. 2019

Water

Self Cite

View full text Add to dashboard Cite

show abstract

“…However, erosion has been greatly reduced by the implementation of widespread soil conservation practices, especially the Grain‐for‐Green Project implemented in 1999. The average annual water and sediment fluxes in the last 20 years were 0.82 km 3 and 32 million tonnes (equivalent to 1060 t km –2 year –1 ), respectively, significantly lower than the records of the 1960s (Han et al ., ; Shi et al ., ).…”

Section: Methodsmentioning

confidence: 97%

Riverine export of water, sediment and carbon during flood events in the arid to semi‐arid Wuding River on the Chinese Loess Plateau

Ran

Yang

Tian

et al. 2020

Earth Surf Processes Landf

View full text Add to dashboard Cite

Floods have become increasingly important in fluvial export of water, sediment and carbon (C). Using high‐frequency sampling, the export of water, sediment and C was examined in the Wuding River catchment on the Chinese Loess Plateau. With groundwater as an important contributor to runoff all year round, floods were relatively less important in the export of water. However, large floods were disproportionately important in exporting sediment and inorganic C (DIC) and organic C (DOC and POC). The three largest floods in each year transported 53.6–97.3 and 41.4–77% of the annual sediment and C fluxes, respectively. An extreme flood in 2017 alone contributed 94.6 and 73.1% of the annual sediment and C fluxes, respectively, in just 7 days, which included 20.3, 92.1 and 35.7% of the annual DOC, POC and DIC fluxes, respectively. A stable carbon isotope (δ13C) analysis of POC indicated that modern soils and C3 plants were its primary source. Furthermore, floods greatly accelerated CO2 degassing due to elevated gas transfer velocity, although stream water CO2 partial pressure (pCO2) exhibited a decreasing trend with flow discharge. Although these results illustrated that increasing runoff diluted pCO2, the timing and magnitude of floods were found to be critical in determining the response of pCO2 to flow dynamics. Low‐magnitude floods in the early wet season increased pCO2 because of enhanced organic matter input, while subsequent large floods caused a lower pCO2 due to greatly reduced organic matter supply. Finally, continuous monitoring of a complete flood event showed that the CO2 efflux during the flood (2348 ± 664 mg C m–2 day–1) was three times that under low‐flow conditions (808 ± 98 mg C m–2 day–1). Our study suggests that infrequent, heavy storm events, which are predicted to increase under climate change, will greatly alter the transport regimes of sediment and C. © 2020 John Wiley & Sons, Ltd.

show abstract

“…In recent years, there has been a series of studies conducted on soil and water conservation focusing on silt-dam gully engineering, terraced fields of slope engineering, and the Grain for Green Project on the Loess Plateau [1][2][3]. These efforts play an important role in the ecological restoration of Loess areas.…”

Section: Introductionmentioning

confidence: 99%

The Impact of Vegetation Successional Status on Slope Runoff Erosion in the Loess Plateau of China

Chang

et al. 2019

Water

Self Cite

View full text Add to dashboard Cite

Slope vegetation restoration is known to influence erosion in the Loess Plateau region in China. The ability of vegetation to mitigate soil erosion under extreme runoff, however, has not been studied in great detail in this region. Here, we examine five typical vegetation communities in the Loess Plateau region that originated from restoration efforts enacted at different times (1, 11, 15, 25, and 40 years). Water scouring experiments were carried out to monitor vegetation community succession and its effects on erosion. These results indicate that the sum of plant importance values increased from 260.72 to 283.06, species density increased from 2.5 to 4.5 per m 2 , and the amount of litter and humus increased from 24.50 to 605.00 g/m 2 during the 1 to 40 years of vegetation community succession. Root biomass and root diameter reached a maximum of approximately 10.80 mg·cm −3 and 0.65 mm at 40 years of recovery. Slope runoff velocity decreased by 47.89% while runoff resistance increased by 35.30 times. The runoff power decreased by 19.75%, the total runoff volume decreased by 2.52 times, and the total sediment yield decreased by 11.60 times in the vegetation community. Slope runoff velocity and power had the largest correlation with aboveground vegetation (0.76, 0.74), total runoff had the largest correlation with underground roots (0.74), and runoff resistance was most strongly correlated with soil structure (0.71). Studies have shown that the succession of vegetation communities can enhance the aboveground ecological functions of plants, thereby significantly reducing the runoff velocity and power. The development of plant root system significantly reduces the runoff volume; the improved soil structure significantly increased the runoff resistance coefficient.

show abstract

Land-use changes and check dams reducing runoff and sediment yield on the Loess Plateau of China

Cited by 165 publications

References 40 publications

Impact Assessments of Rainfall–Runoff Characteristics Response Based on Land Use Change via Hydrological Simulation

Impact Assessments of Rainfall–Runoff Characteristics Response Based on Land Use Change via Hydrological Simulation

Riverine export of water, sediment and carbon during flood events in the arid to semi‐arid Wuding River on the Chinese Loess Plateau

The Impact of Vegetation Successional Status on Slope Runoff Erosion in the Loess Plateau of China

Contact Info

Product

Resources

About