scholarly journals Emergent stationarity in Yellow River sediment transport and the underlying shift of dominance: from streamflow to vegetation

2018 ◽  
Author(s):  
Sheng Ye ◽  
Qihua Ran ◽  
Xudong Fu ◽  
Chunhong Hu ◽  
Guangqian Wang ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Yellow River ◽  
Yellow River Basin ◽  
Sediment Concentration ◽  
Topographic Characteristics ◽  
The Yellow River Basin ◽  
Annual Scale ◽  
Annual Discharge

Abstract. Soil erosion and sediment transport play important roles in terrestrial landscape evolution and biogeochemical cycles of nutrients and contaminants. Although discharge is considered to be a controlling factor in sediment transport, its correlation with sediment concentration varies across the Yellow River Basin (YRB) and is not fully understood. This paper provides analysis from gauges across the YRB covering a range of climate, topographic characteristics and degree of human intervention. Our results show that discharge control on sediment transport is dampened at gauges with large mean annual discharge, where sediment concentration becomes more and more stable. This emergent stationarity can be attributed to vegetation resistance. Our analysis shows that sediment concentration follows a bell shape with vegetation index (normalized difference vegetation index, NDVI) at annual scale despite heterogeneity in climate and landscape. We obtain the counterintuitive result that as mean annual discharge increases, the dominant control on sediment transport shifts from streamflow erosion to vegetation retardation in the YRB.

scholarly journals Emergent stationarity in Yellow River sediment transport and the underlying shift of dominance: from streamflow to vegetation

2019 ◽  
Vol 23 (1) ◽  
pp. 549-556 ◽  
Author(s):  
Sheng Ye ◽  
Qihua Ran ◽  
Xudong Fu ◽  
Chunhong Hu ◽  
Guangqian Wang ◽  
...  
Keyword(s):  
Sediment Transport ◽  
Vegetation Index ◽  
Normalized Difference Vegetation Index ◽  
Yellow River ◽  
Yellow River Basin ◽  
Sediment Concentration ◽  
Topographic Characteristics ◽  
The Yellow River Basin ◽  
Annual Scale ◽  
Annual Discharge

Abstract. Soil erosion and sediment transport play important roles in terrestrial landscape evolution and biogeochemical cycles of nutrients and contaminants. Although discharge is considered to be a controlling factor in sediment transport, its correlation with sediment concentration varies across the Yellow River basin (YRB) and is not fully understood. This paper provides analysis from gauges across the YRB covering a range of climates, topographic characteristics, and degrees of human intervention. Our results show that discharge control on sediment transport is dampened at gauges with large mean annual discharge, where sediment concentration becomes more and more stable. This emergent stationarity can be attributed to vegetation resistance. Our analysis shows that sediment concentration follows a bell shape with vegetation index (normalized difference vegetation index, NDVI) at an annual scale despite heterogeneity in climate and landscape. We obtain the counterintuitive result that, as mean annual discharge increases, the dominant control on sediment transport shifts from streamflow erosion to vegetation retardation in the YRB.

scholarly journals Inheritors of the Yellow River: the relationship of heritage making practices to cultural self-confidence in China

2021 ◽  
Vol 5 (1) ◽  
Author(s):  
Wanlin Zhang ◽  
Stuart Walker ◽  
Martyn Evans ◽  
Julia Bennett
Keyword(s):  
Cultural Awareness ◽  
Yellow River ◽  
Yellow River Basin ◽  
The Yellow River ◽  
Chinese Government ◽  
Active Involvement ◽  
Self Confidence ◽  
Support Mechanisms ◽  
The Yellow River Basin ◽  
Relationship Of

AbstractThrough active involvement in UNESCO’s ICH (Intangible Cultural Heritage) programme, China has developed its own framework to support traditional making practices. To examine the ‘characteristics’ of heritage crafts preservation in China, we undertook empirical research in the Yellow River basin. Our research involved in-depth observations and key informant interviews with a range of highly accomplished craftspeople who have inherited their particular expertise from their family and have been officially designated ICH Inheritors. Through our qualitative research with inheritors, a businessperson and a government official, we identified various support mechanisms employed by the Chinese government that aim to protect traditional culture while also recognising outstanding individuals. We also found that ICH Inheritors play an important role in raising cultural awareness and enhancing cultural confidence through their creative activities and making practices, craft businesses and transfer of expertise. Based on the findings, potential areas where designers may collaborate with inheritors were identified.

scholarly journals Nitrogen Fertilization Effects on Physiology of the Cotton Boll–Leaf System

Agronomy ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 271
Author(s):  
Jing Chen ◽  
Liantao Liu ◽  
Zhanbiao Wang ◽  
Hongchun Sun ◽  
Yongjiang Zhang ◽  
...  
Keyword(s):  
River Basin ◽  
Nitrogen Fertilization ◽  
Yellow River ◽  
Yellow River Basin ◽  
Growth And Yield ◽  
The Yellow River ◽  
Nitrogen Rate ◽  
The Yellow River Basin ◽  
Source Sink ◽  
Subtending Leaves

The objective of this study was to assess the impacts of nitrogen on the physiological characteristics of the source–sink system of upper fruiting branches under various amounts of nitrogen fertilization. A two-year field experiment was conducted with a Bt cotton cultivar in the Yellow River Basin of China. The growth and yield of cotton of the upper fruiting branches were compared under four nitrogen levels: Control (N0, 0 kg ha−1), low nitrogen (N1, 120 kg ha−1), moderate nitrogen (N2, 240 kg ha−1), and high nitrogen (N3, 480 kg ha−1). The results indicated that in the subtending leaves in upper fruiting branches, chlorophyll content, protein content, and peroxidase (POD) activity dramatically increased with nitrogen application, reaching the highest under the moderate nitrogen treatment. The physiological characters in the seeds had the same trends as in the subtending leaves. Furthermore, the moderate nitrogen rate (240 kg ha−1) had a favorable yield and quality. Our results supported that a moderate nitrogen rate (240 kg ha−1) could coordinate the source–sink growth of cotton in the late stage, enhance the yield and fiber quality, and decrease the cost of fertilizer in the Yellow River Basin of China and other similar ecological areas.

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