Effects of precipitation and landuse on runoff during the past 50 years in a typical watershed in Loess Plateau, China

Bi, Huaxing; Liu, Bin; Wu, Jie; Lei, Yang; Zhihan, Chen; Zhewei, Cui

doi:10.1016/s1001-6279(10)60009-1

Cited by 71 publications

(47 citation statements)

References 28 publications

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“…At the annual scale, the land cover change caused a relatively higher impact on water yield in dry years. In general, our study results are consistent with findings in Yellow River Basin in northern China (Wang et al, 2011) and the forest hydrologic community on the hydrologic impacts of reforestation (Brown et al, 2005).…”

Section: Spatial and Temporal Variability Across A Precipitation Gradsupporting

confidence: 91%

“…A recent north-China wide comparison studies on forest cover's role in regulating streamflow by Wang et al (2011) concludes that forest cover percentage has a clear negative relationship with streamflow rate, reconfirming previous watershed studies in the region. Those findings are consistent with world-wide forest hydrology literature that suggests reforestation practices on grasslands generally reduces water yield at the small watershed scale (Bush and Hewlett, 1982;Andreassian, 2004;Brown et al, 2005).…”

Section: M Feng Et Al: Regional Effects Of Vegetation Restoratiosupporting

confidence: 89%

“…Water yield reduction for the cases examined varied from 10 % to 70 %. Bi et al (2009) reports that forestation reduced annual streamflow by 49.6 % (or 6.5 mm per year). Zhang et al (2008a, b)'s time series analysis for multiple large basins across the regions suggests that soil conservation practices that include both tree planting and engineering methods (check dams, terracing) partially explained the observed streamflow declines.…”

Section: M Feng Et Al: Regional Effects Of Vegetation Restoratiomentioning

confidence: 99%

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Regional effects of vegetation restoration on water yield across the Loess Plateau, China

Feng

Sun

et al. 2012

Hydrol. Earth Syst. Sci.

186

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Abstract. The general relationships between vegetation and water yield under different climatic regimes are well established at a small watershed scale in the past century. However, applications of these basic theories to evaluate the regional effects of land cover change on water resources remain challenging due to the complex interactions of vegetation and climatic variability and hydrologic processes at the large scale. The objective of this study was to explore ways to examine the spatial and temporal effects of a large ecological restoration project on water yield across the Loess Plateau region in northern China. We estimated annual water yield as the difference between precipitation input and modelled actual evapotranspiration (ET) output. We constructed a monthly ET model using published ET data derived from eddy flux measurements and watershed streamflow data. We validated the ET models at a watershed and regional levels. The model was then applied to examine regional water yield under land cover change and climatic variability during the implementation of the Grain-for-Green (GFG) project during 1999-2007. We found that water yield in 38 % of the Loess Plateau area might have decreased (1-48 mm per year) as a result of land cover change alone. However, combined with climatic variability, 37 % of the study area might have seen a decrease in water yield with a range of 1-54 mm per year, and 35 % of the study area might have seen an increase with a range of 1-10 mm per year. Across the study region, climate variability masked or strengthened the water yield response to vegetation restoration. The absolute annual water yield change due to vegetation restoration varied with precipitation regimes with the highest in wet years, but the relative water yield changes were most pronounced in dry years. We concluded that the effects of land cover change associated with ecological restoration varied greatly over time and space and were strongly influenced by climatic variability in the arid region. The current regional vegetation restoration projects have variable effects on local water resources across the region. Land management planning must consider the influences of spatial climate variability and long-term climate change on water yield to be more effective for achieving environmental sustainability.

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Section: Spatial and Temporal Variability Across A Precipitation Gradsupporting

confidence: 91%

Section: M Feng Et Al: Regional Effects Of Vegetation Restoratiosupporting

confidence: 89%

Section: M Feng Et Al: Regional Effects Of Vegetation Restoratiomentioning

confidence: 99%

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Regional effects of vegetation restoration on water yield across the Loess Plateau, China

Feng

Sun

et al. 2012

Hydrol. Earth Syst. Sci.

186

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“…Several studies found that the region-averaged annual mean temperature on the Loess Plateau increased significantly over the last fifty years, whereas the region-averaged annual precipitation showed a non-significant negative trend (Bi et al, 2009;Wang et al, 2012). In terms of climate extremes, trends in the hot-day threshold (maximum temperature 90th percentile -the 10th hottest day per season), the cold-night threshold (minimum temperature 10th percentile -the 10th coldest night per season), and the longest heatwave (maximum number of consecutive days with maximum temperature N long-term 90th percentile for each calendar day) have increased over the period 1961 to 2007, whereas the number of frost days has decreased (Li et al, 2010).…”

Section: Introductionmentioning

confidence: 99%

Temperature and precipitation changes over the Loess Plateau between 1961 and 2011, based on high-density gauge observations

Sun

Miao

Duan

et al. 2015

Global and Planetary Change

112

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a b s t r a c t a r t i c l e i n f oThe Loess Plateau has the most serious soil erosion in China and is the main source of sediment in the Yellow River. In this study, we systematically analyzed the changes in the mean and extreme values for temperature and precipitation over the Loess Plateau between 1961 and 2011, using a gridded dataset with high-density gauge data. Statistically significant positive trends (p b 0.05) in the mean, maximum, and minimum temperature values (TM, TX, and TN) were identified in almost all regions. Warming rates increased from the southeast to the northwest of the Loess Plateau for both TM and TN; however, for TX, the greatest warming increases were observed in the southeast region. We also found general decreases in the diurnal temperature range and the number of cold nights and cold days, and increases in the length of the growing season and the number of warm days and warm nights. Moreover, relatively intense changes occurred in the high percentile ranges for both TX and TN. The total amount of precipitation on wet days decreased over a large area of the Loess Plateau, particularly in the southeast region. The inequality in the spread of precipitation over the year (temporal inequality) increased extensively over the past fifty years in the wet region. Approximately 37.60% of the total area with a reduced amount of precipitation had concurrent decreases in both the frequency and intensity of rainfall. However, approximately 37.20% of the area with a reduced amount of precipitation had decreases in the frequency but increases in the intensity of rainfall. The proportion of days with light or moderate precipitation was decreased in the wet region which mainly located in the southwest of the Loess Plateau, but there were only minor changes in extreme precipitation events. Overall, when both temperature and precipitation changes were combined, we observed that the southwest of the Loess Plateau has undergone the largest degree of climate change. Consequently, both the ecological environment and local agriculture on the Loess Plateau will suffer increased challenges: the decline in water availability will lead to more frequent droughts, yet the risk of flood and soil erosion from extreme precipitation events will not be reduced.

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“…Small watersheds are often used as study areas for investigating the relationships between land use patterns and runoff and sediment deposition (Bi et al, 2009;Wang et al, 2008;Zhang, 2012) .…”

Section: Introductionmentioning

confidence: 99%

Optimization of Land Use Pattern Reduces Surface Runoff and Sediment Loss in a Hilly-Gully Watershed at the Loess Plateau, China

et al. 2016

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Aim of study: The aim is to find a way increasing gain yield and lessen area of farmland, and then increasing vegetation cover, improving environment and alleviating soil erosion.Area of study: The Hilly-Gully region at the loess plateau of China. Material and methods:In this study, an adjusted and optimized land use pattern was developed in Luoyugou watershed in the Yellow River valley based on the gradient distribution of land use types, and its effect on water and sediment transport was simulated using the SWAT model and GIS, with remote sensing images, land use maps and hydrologic data.Main results: The results indicate: average simulated runoff and sediment for the period 1986-2000 under conditions of the three land use pattern (2011, 2008 and optimized land use) reduced by 0.002-0.013 m 3 /s (2.7-17.6%) and 0.66 million tons, respectively. The runoff and sediment data obtained were compared with observed data from 2008, which showed that runoff and sediment production would be reduced by 467625 m 3 and 22754 tons, respectively.Research highlights: The adjustment of the land use pattern in comprehensive consideration of vegetation and geography have a positive effect on water and sediment transport which will be important for decision making and water resources management, and provides a reference for future environmental management and ecological construction in the loess plateau Hilly-Gully region.

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Effects of precipitation and landuse on runoff during the past 50 years in a typical watershed in Loess Plateau, China

Cited by 71 publications

References 28 publications

Regional effects of vegetation restoration on water yield across the Loess Plateau, China

Regional effects of vegetation restoration on water yield across the Loess Plateau, China

Temperature and precipitation changes over the Loess Plateau between 1961 and 2011, based on high-density gauge observations

Optimization of Land Use Pattern Reduces Surface Runoff and Sediment Loss in a Hilly-Gully Watershed at the Loess Plateau, China

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