scholarly journals Effects of climate change on spring wheat phenophase and water requirement in Heihe River basin, China

2017 ◽  
Vol 126 (1) ◽  
Author(s):  
DONGMEI HAN ◽  
DENGHUA YAN ◽  
XINYI XU ◽  
YU GAO
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Spring Wheat ◽  
Water Requirement ◽  
Heihe River Basin ◽  
Heihe River

scholarly journals Quantification of the impacts of climate change and human agricultural activities on oasis water requirements in an arid region: a case study of the Heihe River basin, China

2018 ◽  
Vol 9 (1) ◽  
pp. 211-225 ◽  
Author(s):  
Xingran Liu ◽  
Yanjun Shen
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Water Resource Management ◽  
Arid Regions ◽  
Agricultural Development ◽  
Water Requirement ◽  
Heihe River Basin ◽  
Heihe River ◽  
Agricultural Activities ◽  
Water Requirements

Abstract. Ecological deterioration in arid regions caused by agricultural development has become a global issue. Understanding water requirements of the oasis ecosystems and the influences of human agricultural activities and climate change is important for the sustainable development of oasis ecosystems and water resource management in arid regions. In this study, water requirements of the main oasis in Heihe River basin during 1986–2013 were analyzed and the amount showed a sharp increase from 10.8 × 108 m3 in 1986 to 19.0 × 108 m3 in 2013. Both human agricultural activities and climate change could lead to the increase in water requirement. To quantify the contributions of agricultural activities and climate change to the increase in water requirements, partial derivative and slope method were used. Results showed that climate change and human agricultural activities, such as oasis expansion and changes in land cropping structure, has contributed to the increase in water requirement at rates of 6.9, 58.1, and 25.3 %, respectively. Overall, human agricultural activities were the dominant forces driving the increase in water requirement. In addition, the contribution of oasis expanding to the increased water requirement was significantly greater than that of other concerned variables. This reveals that controlling the oasis scale is extremely important and effective for balancing water for agriculture and ecosystems and to achieving a sustainable oasis development in arid regions.

scholarly journals Water requirements of the oasis in the middle Heihe River Basin, China: Trends and causes

2017 ◽  
Author(s):  
Xingran Liu ◽  
Yanjun Shen
Keyword(s):  
River Basin ◽  
Spring Wheat ◽  
Water Requirement ◽  
Heihe River Basin ◽  
Heihe River ◽  
Cultivated Land ◽  
Water Requirements ◽  
Study Region ◽  
The Past ◽  
Annual Water

Abstract. The middle Heihe River Basin is the main grain base of the northwestern China, where consumed the most water in the whole Heihe River basin. Increasing share of water resources in the middle Heihe River Basin has caused various issues in hydrology, ecology and environment in the Heihe River Basin, especially the downstream. To make clear how and why the water requirement has changed is significant for the water management in the study region. During the past ~30 years, the water requirement amount of the oasis increased from 10.7 × 108 m3 in 1986 to 18.8 × 108 m3 in 2013. And 76 %–82 % of the oasis water requirement amount was consumed by the cultivated land. Maize, spring wheat, and vegetable are the main crops in the middle Heihe River Basin. The mean annual water requirements of the maize, spring wheat, and vegetable were 562.4 mm, 408.7 mm, and 719.0 mm, respectively. By the contribution analysis, the extended planting area was the primary reason why the water requirement has increased in the past ~30 years, the contribution of which to the long-term trend in annual water requirement was 58.3 % and 60.6 % for the oasis and cultivated land, respectively. The changes in land structure were the secondary reason, which explained 25.3 % and 23.4 % of the water requirement variation in the oasis and cultivated land, respectively. The contribution of the climate change was relatively less, which contributed only 7.0 % and 6.8 % to the water requirement variation in the oasis and cultivated land, respectively.

scholarly journals Water Productivity Evaluation under Multi-GCM Projections of Climate Change in Oases of the Heihe River Basin, Northwest China

2019 ◽  
Vol 16 (10) ◽  
pp. 1706 ◽  
Author(s):  
Liu Liu ◽  
Zezhong Guo ◽  
Guanhua Huang ◽  
Ruotong Wang
Keyword(s):  
Climate Change ◽  
Sustainable Development ◽  
River Basin ◽  
Water Productivity ◽  
Northwest China ◽  
Hexi Corridor ◽  
Heihe River Basin ◽  
Heihe River ◽  
Crop Water ◽  
The Heihe River Basin

As the second largest inland river basin situated in the middle of the Hexi Corridor, Northwest China, the Heihe River basin (HRB) has been facing a severe water shortage problem, which seriously restricts its green and sustainable development. The evaluation of climate change impact on water productivity inferred by crop yield and actual evapotranspiration is of significant importance for water-saving in agricultural regions. In this study, the multi-model projections of climate change under the three Representative Concentration Pathways emission scenarios (RCP2.6, RCP4.5, RCP8.5) were used to drive an agro-hydrological model to evaluate the crop water productivity in the middle irrigated oases of the HRB from 2021–2050. Compared with the water productivity simulation based on field experiments during 2012–2015, the projected water productivity in the two typical agricultural areas (Gaotai and Ganzhou) both exhibited an increasing trend in the future 30 years, which was mainly attributed to the significant decrease of the crop water consumption. The water productivity in the Gaotai area under the three RCP scenarios during 2021–2050 increased by 9.2%, 14.3%, and 11.8%, while the water productivity increased by 15.4%, 21.6%, and 19.9% in the Ganzhou area, respectively. The findings can provide useful information on the Hexi Corridor and the Belt and Road to policy-makers and stakeholders for sustainable development of the water-ecosystem-economy system.

IMPACT OF FUTURE CLIMATE CHANGE (2020–2059) ON THE HYDROLOGICAL REGIME IN THE HEIHE RIVER BASIN IN SHAANXI PROVINCE, CHINA

2019 ◽  
Vol 01 (01) ◽  
pp. 1950003 ◽  
Author(s):  
AIDI HUO ◽  
XIAOFAN WANG ◽  
YUXIANG CHENG ◽  
CHUNLI ZHENG ◽  
CHENG JIANG
Keyword(s):  
Climate Change ◽  
Water Resources ◽  
River Basin ◽  
Hydrological Regime ◽  
Annual Runoff ◽  
Heihe River Basin ◽  
Shaanxi Province ◽  
Future Climate Change ◽  
Heihe River ◽  
The Heihe River Basin

Assessing the impacts of climate change on hydrological regime and associated social and economic activities (such as farming) is important for water resources management in any river basin. In this study, we used the popular Soil and Water Assessment Tool (SWAT) to evaluate the impacts of future climate change on the availability of water resources in the Heihe River basin located within Shaanxi Province, China, in terms of runoff and streamflow. The results show that over the next 40 years (starting in 2020 till 2059), changes in the averaged annual runoff ratio are approximately [Formula: see text]11.0%, [Formula: see text]6.4%, 7.2%, and 20.4% for each of the next four consecutive decades as compared to the baseline period (2010–2019). The predicted annual runoff demonstrates an increase trend after a reduction and may result in increased drought and flood risk in the Heihe River basin. To minimize or mitigate these impacts, various adaptation methods have been proposed for the study area, such as stopping irrigation, flood control operation; reasonable development and utilization of regional underground water sources should be implemented in Zhouzhi county and Huyi region in the lower reaches of Heihe River basin.

scholarly journals Effects of Climate Change and LUCC on Terrestrial Biomass in the Lower Heihe River Basin during 2001–2010

Energies ◽  
2016 ◽  
Vol 9 (4) ◽  
pp. 260 ◽  
Author(s):  
Haiming Yan ◽  
Jinyan Zhan ◽  
Feng Wu ◽  
Huicai Yang
Keyword(s):  
Climate Change ◽  
River Basin ◽  
Heihe River Basin ◽  
Heihe River ◽  
Lower Heihe River ◽  
Terrestrial Biomass

A distributed hydrological model in the Heihe River basin and its potential for estimating the required irrigation water

2016 ◽  
Vol 48 (1) ◽  
pp. 191-213 ◽  
Author(s):  
Lei Li ◽  
Zongxue Xu ◽  
Jie Zhao ◽  
Longqiang Su
Keyword(s):  
River Basin ◽  
Irrigation Water ◽  
Grid Cell ◽  
Control Site ◽  
Water Requirement ◽  
Heihe River Basin ◽  
Heihe River ◽  
Grid Cells ◽  
Irrigation Water Requirement ◽  
The Heihe River Basin

A Grid-based Integrated Surface–Groundwater Model (GISMOD) was developed to estimate the required irrigation water using a control-site method. The entire catchment is divided into multiple grid cells of equal size, and several grid cells can be chosen as the control sites by users in this model. The grid cells from the upper stream of each control site, which have a land-use type of farmland, are automatically identified as a controlled grid cell. The crop information around each controlled grid cell is set to be the same as its corresponding control site. Next, the irrigation water requirement for each controlled grid cell is calculated using a crop coefficient method that is integrated into the human water-use module of the GISMOD. After runoff is generated, the actual discharge of each control site is computed by comparing the available water sources with the irrigation water requirement based on the water-supply operation rules of the model. This paper subsequently presents a case study in the upper-middle reaches of the Heihe River to evaluate the performance of the GISMOD. The results demonstrate that the actual water consumption for irrigation in the Heihe River basin could be generally estimated by the GISMOD on a monthly basis.

scholarly journals Land Use Zoning for Conserving Ecosystem Services under the Impact of Climate Change: A Case Study in the Middle Reaches of the Heihe River Basin

2015 ◽  
Vol 2015 ◽  
pp. 1-13 ◽  
Author(s):  
Chenchen Shi ◽  
Jinyan Zhan ◽  
Yongwei Yuan ◽  
Feng Wu ◽  
Zhihui Li
Keyword(s):  
Climate Change ◽  
Land Use ◽  
Ecosystem Services ◽  
River Basin ◽  
Heihe River Basin ◽  
Heihe River ◽  
Impact Of Climate Change ◽  
The Impact ◽  
The Heihe River Basin

Ecosystem services are the benefit human populations derive directly and indirectly from the natural environment. They suffer from both the human intervention, like land use zoning change, and natural intervention, like the climate change. Under the background of climate change, regulation services of ecosystem could be strengthened under proper land use zoning policy to mitigate the climate change. In this paper, a case study was conducted in the middle reaches of the Heihe River Basin to assess the ecosystem services conservation zoning under the change of land use associated with climate variations. The research results show the spatial impact of land use zoning on ecosystem services in the study area which are significant reference for the spatial optimization of land use zoning in preserving the key ecosystem services to mitigate the climate change. The research contributes to the growing literature in finely characterizing the ecosystem services zones altered by land use change to alleviate the impact of climate change, as there is no such systematic ecosystem zoning method before.

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