scholarly journals Evolution of Vegetation System in Heihe River Basin in the last 2000 years

2017 ◽  
Author(s):  
Shoubo Li ◽  
Yan Zhao ◽  
Yongping Wei ◽  
Hang Zeng
Keyword(s):  
River Basin ◽  
Rapid Development ◽  
Social Economy ◽  
River Basin Management ◽  
Development Stage ◽  
Heihe River Basin ◽  
Heihe River ◽  
Landsat Images ◽  
Past 2000 Years

Abstract. The response of vegetation system to the long-term changes in climate, hydrology, and social-economy in a river basin is critical for sustainable river basin management. This study aims to investigate the evolution of natural and crop vegetation systems in Heihe River Basin (HRB) over the past 2000 years. Archived Landsat images were applied to derive vegetation spatial extent and biomass for 1987 to 2015. The area and biomass of the vegetation before 1987 were reconstructed based on previous research results the derived relationship between the vegetation biomass and climatic and hydrological variables in the last 30 years with instrumental data. The key findings are: 1) both natural and crop vegetation have gone three development stages: Pre-development stage (before 1949), rapid development stage (1949–2000), and post-development stage (after 2000); 2) there was a much faster increase of crop biomass than that of native vegetation since 1949, and 3) the ratio of natural vegetation to crop vegetation decreased from 16 at Yuan Dynasty to at about 2.2 since 2005. This ratio represents the land and water development at river basin at changing climate and social-economy, it could be used as an indicator to plan the objective or examine the outcome of water and land management at river basin.

scholarly journals Estimating Evaporation from Irrigation Canals in the Midstream Areas of the Heihe River Basin by a Double-Deck Surface Air Layer (DSAL) Model

Water ◽  
2019 ◽  
Vol 11 (9) ◽  
pp. 1788
Author(s):  
Weizhen Wang ◽  
Feinan Xu ◽  
Suhua Liu ◽  
Long Wei ◽  
Jiaojiao Feng ◽  
...  
Keyword(s):  
River Basin ◽  
Irrigation Water ◽  
Heihe River Basin ◽  
Heihe River ◽  
Irrigation Canals ◽  
Running Water ◽  
Evaporation Loss ◽  
Surface Air Layer ◽  
The Heihe River Basin

Accurate quantification of evaporation loss from irrigation canals at an irrigation district scale is very useful for developing efficient irrigation strategies, particularly in water-deficient regions. The double-deck surface air layer (DSAL) model, a new aerodynamic method proposed by Kobayashi et al. (2013), is used for estimating the evaporation loss from a running water surface in irrigation canals. In this study, based on the long-term meteorological measurements made at automatic weather stations in 2013 and the field experiment conducted at - midstream areas of the Heihe River Basin (HRB), northwestern China, the DSAL model was applied to estimate the long-term evaporation loss from irrigation canals, which was the remarkable highlight of the study. The results showed that the rate of evaporation from irrigation canals exhibited a concave-up trend for the period from June to September, with higher values in June and September (20 to 50 mm day−1) and lower values in July and August (around 10 mm day−1). During the four months, for the Yingke and Daman irrigation districts in the Zhangye Oasis, the total water losses from irrigation canals due to evaporation were approximately 23.9 × 105 m3 and 36.6 × 105 m3, or 3.2% and 4.8% of the total amount of irrigation water, respectively. Results of the study are not only important for improving the irrigation water use efficiency, but also are beneficial to develop sustainable water resource management in the midstream areas of the HRB.

scholarly journals Integrated study of the water–ecosystem–economy in the Heihe River Basin

2014 ◽  
Vol 1 (3) ◽  
pp. 413-428 ◽  
Author(s):  
Guodong Cheng ◽  
Xin Li ◽  
Wenzhi Zhao ◽  
Zhongmin Xu ◽  
Qi Feng ◽  
...  
Keyword(s):  
River Basin ◽  
Management Practices ◽  
River Basins ◽  
River Basin Management ◽  
Heihe River Basin ◽  
Water Diversion ◽  
Heihe River ◽  
Inland River ◽  
Water Ecosystem ◽  
The Heihe River Basin

AbstractThe ecological water diversion project in the Heihe River Basin is the first successful case in China in which the ecological systems in a river basin have been rescued. This project serves as a valuable example for the management of ecosystems in other inland river basins. This paper reviews the integrated studies of the water–ecosystem–economy relationship in the Heihe River Basin and concludes that sustainable development in inland river basins requires the basin to be considered as a whole, with the relationships between the upstream, midstream and downstream areas of the basin coordinated appropriately. Successful development in these basins will be reflected in an improved output per cubic meter of water and the implementation of integrated river basin management practices.

scholarly journals Evolution of the vegetation system in the Heihe River basin in the last 2000 years

2017 ◽  
Vol 21 (8) ◽  
pp. 4233-4244 ◽  
Author(s):  
Shoubo Li ◽  
Yan Zhao ◽  
Yongping Wei ◽  
Hang Zheng
Keyword(s):  
River Basin ◽  
Social Economic ◽  
River Basins ◽  
Development Stage ◽  
Economic Conditions ◽  
Heihe River ◽  
Republic Of China ◽  
Hydrological Conditions ◽  
The Heihe River Basin

Abstract. The response of vegetation systems to the long-term changes in climate, hydrology, and social–economic conditions in river basins is critical for sustainable river basin management. This study aims to investigate the evolution of natural and crop vegetation systems in the Heihe River basin (HRB) over the past 2000 years. Archived Landsat images, historical land use maps and hydrological records were introduced to derive the long-term spatial distribution of natural and crop vegetation and the corresponding biomass levels. The major findings are that (1) both natural and crop vegetation experienced three development stages: a pre-development stage (before the Republic of China), a rapid development stage (Republic of China – 2000), and a post-development stage (after 2000). Climate and hydrological conditions did not show significant impacts over crop vegetation, while streamflow presented synchronous changes with natural vegetation in the first stage. For the second stage, warmer temperature and increasing streamflow were found to be important factors for the increase in both natural and crop vegetation in the middle reaches of the HRB. For the third stage, positive climate and hydrological conditions, together with policy interventions, supported the overall vegetation increase in both the middle and lower HRB; (2) there was a significantly faster increase in crop biomass than that of native vegetation since 1949, which could be explained by the technological development; and (3) the ratio of natural vegetation to crop vegetation decreased from 16 during the Yuan Dynasty to about 2.2 since 2005. This ratio reflects the reaction of land and water development to a changing climate and altering social–economic conditions at the river basin level; therefore, it could be used as an indicator of water and land management at river basins.

scholarly journals Validation and Analysis of Long-Term AATSR Land Surface Temperature Product in the Heihe River Basin, China

2017 ◽  
Vol 9 (2) ◽  
pp. 152 ◽  
Author(s):  
Xiaoying Ouyang ◽  
Dongmei Chen ◽  
Si-Bo Duan ◽  
Yonghui Lei ◽  
Youjun Dou ◽  
...  
Keyword(s):  
Surface Temperature ◽  
River Basin ◽  
Land Surface Temperature ◽  
Land Surface ◽  
Heihe River Basin ◽  
Heihe River ◽  
The Heihe River Basin

scholarly journals Evolution of the human–water relationships in Heihe River basin in the past 2000 years

2015 ◽  
Vol 12 (1) ◽  
pp. 1059-1091 ◽  
Author(s):  
Z. Lu ◽  
Y. Wei ◽  
H. Xiao ◽  
S. Zou ◽  
J. Xie ◽  
...  
Keyword(s):  
River Basin ◽  
Management Practices ◽  
Process Analysis ◽  
Evolutionary Process ◽  
Northern China ◽  
Heihe River Basin ◽  
Heihe River ◽  
Policy Makers ◽  
The Past ◽  
Past 2000 Years

Abstract. This paper quantitatively analyzed the evolution of human–water relationships in the Heihe River basin of northern China over the past 2000 years by reconstructing the catchment water balance partitioning precipitation into evapotranspiration and runoff. The reconstruction results provided the basis for investigating the impacts of human societies on hydrological systems. Based on transition theory the evolutionary processes of human–water relationships can be divided into four stages: predevelopment (206 BC–AD 1368), take-off (AD 1368–1949), acceleration (AD 1949–2000), and rebalancing (after AD 2000). The evolutionary process analysis revealed that there were large differences in the rate and scale of change and the period over which they occurred, and transition of the human–water relationship had no fixed pattern. This understanding of the dynamics of the human–water relationship will assist policy makers to identify management practices that require improvement by understanding how today's problems were created in the past, for more sustainable catchment in the future.

scholarly journals Evolution of the human–water relationships in the Heihe River basin in the past 2000 years

2015 ◽  
Vol 19 (5) ◽  
pp. 2261-2273 ◽  
Author(s):  
Z. Lu ◽  
Y. Wei ◽  
H. Xiao ◽  
S. Zou ◽  
J. Xie ◽  
...  
Keyword(s):  
River Basin ◽  
Management Practices ◽  
Evolutionary Process ◽  
Northern China ◽  
Heihe River Basin ◽  
Heihe River ◽  
Catchment Management ◽  
The Past ◽  
Past 2000 Years ◽  
The Heihe River Basin

Abstract. This paper quantitatively analyzed the evolution of human–water relationships in the Heihe River basin of northern China over the past 2000 years by reconstructing the catchment water balance by partitioning precipitation into evapotranspiration and runoff. The results provided the basis for investigating the impacts of societies on hydrological systems. Based on transition theory and the rates of changes of the population, human water consumption and the area of natural oases, the evolution of human–water relationships can be divided into four stages: predevelopment (206 BC–AD 1368), take-off (AD 1368–1949), acceleration (AD 1949–2000), and the start of a rebalancing between human and ecological needs (post AD 2000). Our analysis of the evolutionary process revealed that there were large differences in the rate and scale of changes and the period over which they occurred. The transition of the human–water relationship had no fixed pattern. This understanding of the dynamics of the human–water relationship will assist policy makers in identifying management practices that require improvement by understanding how today's problems were created in the past, which may lead to more sustainable catchment management in the future.

Sign in / Sign up

Export Citation Format

Share Document