Detecting water yield variability due to the small proportional land use and land cover changes in a watershed on the Loess Plateau, China

2009 ◽  
Vol 23 (21) ◽  
pp. 3083-3092 ◽  
Author(s):  
Shengping Wang ◽  
Zhiqiang Zhang ◽  
Ge Sun ◽  
Steven G. McNulty ◽  
Manliang Zhang
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Loess Plateau ◽  
Yield Variability ◽  
Water Yield ◽  
Land Cover Changes ◽  
The Loess Plateau

scholarly journals Assessing Impacts of Land Use/Land Cover Conversion on Changes in Ecosystem Services Value on the Loess Plateau, China

2020 ◽  
Vol 12 (17) ◽  
pp. 7128
Author(s):  
Wei Jiang ◽  
Bojie Fu ◽  
Yihe Lü
Keyword(s):  
Land Use ◽  
Ecosystem Services ◽  
Land Cover ◽  
Loess Plateau ◽  
Ecosystem Service ◽  
Land Cover Changes ◽  
Land Use Land Cover ◽  
The Loess Plateau ◽  
Average Value ◽  
Value Changes

The Loess Plateau is not only a critical region that suffers from ecological threats but also a valuable region that provides various fundamental ecosystem services, including provisioning, regulating and cultural services to about 8% of the Chinese population. The specific natural environment and extensive human activities have led to substantial land use/land cover changes between 1990 and 2015, such as the decrease in cropland with the increase in forests and grasslands due to the implementation of the Grain for Green Program since 2000 and the expansion of built-up areas with economic development and population growth. However, the effects of these changes on ecosystem service values have not yet been considered. In this study, the approach based on a combination of land use/land cover proxies and benefit transfer is applied to assess ecosystem service value changes resulting from land use/land cover changes in the 1990–2000, 2000–2010 and 2010–2015 periods. The results reveal that the total value of ecosystem services has been reduced by $6.787 million from 1990 to 2000 and increased by $4.6 million from 2000 to 2015. The elasticity analysis shows that a 1% area conversion has induced average value changes of 1.03%, 0.38% and 0.05% in the three periods, respectively. Elasticity is developed as an indicator for locating unusual changes among different regions and identifying specific needs for ecosystem management.

scholarly journals Land use/land cover changes and regional climate over the Loess Plateau during 2001–2009. Part I: observational evidence

2014 ◽  
Vol 129 (3-4) ◽  
pp. 427-440 ◽  
Author(s):  
Xingang Fan ◽  
Zhuguo Ma ◽  
Qing Yang ◽  
Yunhuan Han ◽  
Rezaul Mahmood ◽  
...  
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Loess Plateau ◽  
Regional Climate ◽  
Observational Evidence ◽  
Land Cover Changes ◽  
Land Use Land Cover ◽  
The Loess Plateau

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

2012 ◽  
Vol 16 (8) ◽  
pp. 2617-2628 ◽  
Author(s):  
X. M. Feng ◽  
G. Sun ◽  
B. J. Fu ◽  
C. H. Su ◽  
Y. Liu ◽  
...  
Keyword(s):  
Land Cover ◽  
Land Cover Change ◽  
Ecological Restoration ◽  
Loess Plateau ◽  
Climatic Variability ◽  
Vegetation Restoration ◽  
Water Yield ◽  
The Loess Plateau ◽  
Regional Effects ◽  
Annual Water

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.

scholarly journals Hydrological Responses to Climate and Land Use Changes in a Watershed of the Loess Plateau, China

2019 ◽  
Vol 11 (5) ◽  
pp. 1443 ◽  
Author(s):  
Rui Yan ◽  
Yanpeng Cai ◽  
Chunhui Li ◽  
Xuan Wang ◽  
Qiang Liu
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Water Balance ◽  
Loess Plateau ◽  
Climate Changes ◽  
Land Use Changes ◽  
Water Yield ◽  
The Loess Plateau ◽  
Runoff Water ◽  
Lulc Change

This study researched the individual and combined impacts of future LULC and climate changes on water balance in the upper reaches of the Beiluo River basin on the Loess Plateau of China, using the scenarios of RCP4.5 and 8.5 of the Fifth Assessment Report of the Intergovernmental Panel on Climate Change (IPCC). The climate data indicated that both precipitation and temperature increased at seasonal and annual scales from 2020 to 2050 under RCP4.5 and 8.5 scenarios. The future land use changes were predicted through the CA-Markov model. The land use predictions of 2025, 2035, and 2045 indicated rising forest areas with decreased agricultural land and grassland. In this study, three scenarios including only LULC change, only climate change, and combined climate and LULC change were established. The SWAT model was calibrated, validated, and used to simulate the water balance under the three scenarios. The results showed that increased rainfall and temperature may lead to increased runoff, water yield, and ET in spring, summer, and autumn and to decreased runoff, water yield, and ET in winter from 2020 to 2050. However, LULC change, compared with climate change, may have a smaller impact on the water balance. On an annual scale, runoff and water yield may gradually decrease, but ET may increase. The combined effects of both LULC and climate changes on water balance in the future were similar to the variation trend of climate changes alone at both annual and seasonal scales. The results obtained in this study provide further insight into the availability of future streamflow and can aid in water resource management planning in the study area.

scholarly journals Impacts of Land-Use and Land-Cover Changes on Water Yield: A Case Study in Jing-Jin-Ji, China

2018 ◽  
Vol 10 (4) ◽  
pp. 960 ◽  
Author(s):  
Suxiao Li ◽  
Hong Yang ◽  
Martin Lacayo ◽  
Junguo Liu ◽  
Guangchun Lei
Keyword(s):  
Land Use ◽  
Land Cover ◽  
Water Yield ◽  
Land Cover Changes

scholarly journals Hydrologic Responses to Land Use Change in the Loess Plateau: Case Study in the Upper Fenhe River Watershed

2015 ◽  
Vol 2015 ◽  
pp. 1-10 ◽  
Author(s):  
Zhixiang Lu ◽  
Songbing Zou ◽  
Zuodong Qin ◽  
Yonggang Yang ◽  
Honglang Xiao ◽  
...  
Keyword(s):  
Remote Sensing ◽  
Land Use ◽  
Loess Plateau ◽  
Hydrological Modeling ◽  
Swat Model ◽  
Water Yield ◽  
The Loess Plateau ◽  
River Watershed ◽  
Lulc Changes ◽  
Basin Scale

We applied an integrated approach to investigate the impacts of land use and land cover (LULC) changes on hydrology at different scales in the Loess Plateau of China. Hydrological modeling was conducted for the LULC maps from remote sensing images at two times in the Upper Fenhe River watershed using the SWAT model. The main LULC changes in this watershed from 1995 to 2010 were the transformation of farmland into forests, grassland, and built-up land. The simulation results showed that forested land contributed more than any other LULC class to water yield, but built-up land had most impact due to small initial loss and infiltration. At basin scale, a comparison of the simulated hydrological components of two LULC maps showed that there were slight increases in average annual potential evapotranspiration, actual evapotranspiration, and water yield, but soil water decreased, between the two intervals. In subbasins, obvious LULC changes did not have clear impacts on hydrology, and the impacts may be affected by precipitation conditions. By linking a hydrological model to remote sensing image analysis, our approach of quantifying the impacts of LULC changes on hydrology at different scales provide quantitative information for stakeholders in making decisions for land and water resource management.

scholarly journals Spatiotemporal response of the water cycle to land use conversions in a typical hilly-gully basin on the Loess Plateau, China

2017 ◽  
Author(s):  
Linjing Qiu ◽  
Yiping Wu ◽  
Lijing Wang ◽  
Xiaohui Lei ◽  
Weihong Liao ◽  
...  
Keyword(s):  
Land Use ◽  
Soil Water ◽  
Loess Plateau ◽  
Surface Runoff ◽  
Climate Impacts ◽  
Water Yield ◽  
The Loess Plateau ◽  
Lulc Changes ◽  
Sloping Land ◽  
Hydrological Effects

Abstract. The hydrological effects of the ‘Grain for Green’ project (GFGP) on the Loess Plateau have been largely debated due to the complexity of the water system and its multiple driving factors. The aim of this study was to investigate the response of the hydrological cycle to the GFGP measures based on a case study of the Yanhe basin, a typical hilly-gully area on the Loess Plateau of China. First, we analyzed the land use and land cover (LULC) changes from 1990 to 2010. Then, we evaluated the effects of LULC changes and sloping land conversion on the main hydrological components in the basin considering the land surface characteristics and climate impacts. The Soil and Water Assessment Tool (SWAT) was used for this analysis. The results indicated that farmland exhibited a decreasing trend declining from 40.2 % of the basin area in 1990 to 17.6 % in 2010, and the woodland and grassland areas correspondingly increased due to the implementation of the GFGP in the basin. Due to land use changes from 1990 to 2010, surface runoff and the water yield exhibited decreasing trends, whereas evapotranspiration (ET) increased, resulting in a persistent decrease in soil water. Additionally, converting cropland areas with slopes ≥ 15° or > 25° to grassland and woodland had negative effects on surface runoff, the water yield and soil water and a positive effect on ET. The magnitudes of the hydrological effects generated by sloping cropland to woodland conversion were greater than those for sloping cropland to grassland conversion. These results suggest that the expansive revegetation of sloping land could reduce runoff generation, particularly in woodland areas, but these effects could reduce the soil water volume in the region. Overall, this study can be used to improve sustainable land use planning and water resource management on the Loess Plateau in China.

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