scholarly journals A Comprehensive Study of the Impact of Large-Scale Landscape Pattern Changes on the Watershed Ecosystem

Water ◽  
2021 ◽  
Vol 13 (10) ◽  
pp. 1361
Author(s):  
Hai Liu ◽  
Heng Di ◽  
Yuefei Huang ◽  
Liang Zheng ◽  
Yuan Zhang
Keyword(s):  
Landscape Pattern ◽  
Water Conservation ◽  
Water Storage ◽  
Water Source ◽  
Water Diversion ◽  
Growth Trend ◽  
Danjiangkou Reservoir ◽  
Climate Regulation ◽  
Water Diversion Project ◽  
The Impact

The South-to-North Water Diversion Project (SNWD) is the world’s largest inter-basin water diversion project, and the Danjiangkou Reservoir is a water source of the middle route project of the SNWD. Dynamic monitoring of ecological environment changes in Danjiangkou Water source area can provide theoretical support for reservoir water storage security and ecosystem protection. In this study, the water storage of Danjiangkou reservoir was estimated and its dynamic change was analyzed. On this basis, the changes of landscape pattern and ecosystem services value caused by the SNWD project were analyzed. The results show that the reservoir storage presented an obvious growth trend from 2000 to 2019, especially after the middle route of the SNWD was opened in 2014. After the implementation of the SNWD project, the vegetation degradation in Danjiangkou reservoir area was obvious, which is mainly related to the expansion of construction land. The ecosystem service value of the Danjiangkou Reservoir was mainly determined by the water conservation supply value and climate regulation value. After the implementation of the SNWD project, the values of water conservation and supply, climate regulation, and hydropower generation showed an increasing trend, while the values of fixing carbon and releasing oxygen, and organic matter production showed a decreasing trend.

scholarly journals Detecting Water Diversion Fingerprints in the Danjiangkou Reservoir from Satellite Gravimetry and Altimetry Data

Sensors ◽  
2019 ◽  
Vol 19 (16) ◽  
pp. 3510
Author(s):  
Nengfang Chao ◽  
Gang Chen ◽  
Zhicai Luo ◽  
Xiaoli Su ◽  
Zhengtao Wang ◽  
...  
Keyword(s):  
Water Level ◽  
Water Storage ◽  
Water Diversion ◽  
Spatiotemporal Variability ◽  
Spatiotemporal Pattern ◽  
The South ◽  
Danjiangkou Reservoir ◽  
Water Diversion Project ◽  
North Water ◽  
And Storage

The Danjiangkou Reservoir (DJKR) is the freshwater source for the Middle Route of the South-to-North Water Diversion Project in China, and its water level and storage changes are important for water resource management. To maximize the potential capacity of the Gravity Recovery and Climate Experiment (GRACE) mission, an improved Lagrange multiplier method (ILMM) is first proposed to detect terrestrial water storage anomalies (TWSA) in the small-scale basin (DJKR). Moreover, for the first time, water diversion fingerprints are proposed to analyze the spatiotemporal pattern of the TWSA in the DJKR. The results indicate that the increased water level and storage signals due to the DJKR impoundment in 2014 can be effectively detected by using the ILMM, and they agree well with the results from altimetry and in situ data. Additionally, the water diversion fingerprints due to the DJKR impoundment are inferred, and describe the progression of spatiotemporal variability in water storage. The results show that water storage decreased in the upper Hanjiang River and increased in the DJKR as well as to the east of it during the period 2013–2015. Our research provides a scientific decision-making basis for monitoring the water resources of the DJKR and managing the South-to-North Water Diversion Project.

scholarly journals Driving factors for runoff decline in the Upper Hanjiang basin, a major water source for the South-to-North Water Diversion Project in China

2015 ◽  
Vol 368 ◽  
pp. 63-68
Author(s):  
S. Zhang ◽  
D. Yang ◽  
X. Xu
Keyword(s):  
Landscape Change ◽  
Water Source ◽  
Qualitative Description ◽  
Water Diversion ◽  
The South ◽  
Runoff Change ◽  
Water Diversion Project ◽  
North Water ◽  
Runoff Decrease ◽  
The Impact

Abstract. With dramatic changes in climate and land-cover patterns around the world, it is of great significance to evaluate the corresponding influence on runoff change as water resources have become a strategic resource. We analysed the runoff change driven by landscape change and climate variation in Hanjiang River basin, which is the water source area of the central route of the South-to-North Water Diversion Project in China. Results show that the runoff decreased greatly from 1960 to 2012 in all the six selected sub-catchments. Attribution analysis results show that reduction of precipitation contributed to the catchment runoff decrease by 39.5–64.9% and landscape change, represented by increase of the parameter in the mathematical Budyko function contributed to the runoff decrease by 34.4–63.3%, while potential evapotranspiration change had a slightly negative contribution. In addition, the contribution is spatially variable from downstream to upstream. We conclude with a qualitative description about how water availability changes under changing landscape and climate conditions, and focus on the impact of vegetation cover change.

scholarly journals Temporal and Spatial Changes of Non-Point Source N and P and Its Decoupling from Agricultural Development in Water Source Area of Middle Route of the South-to-North Water Diversion Project

2019 ◽  
Vol 11 (3) ◽  
pp. 895 ◽  
Author(s):  
Liguo Zhang ◽  
Zhanqi Wang ◽  
Ji Chai ◽  
Yongpeng Fu ◽  
Chao Wei ◽  
...  
Keyword(s):  
Point Source ◽  
Quantitative Estimation ◽  
Effective Means ◽  
Source Area ◽  
Water Source ◽  
Scientific Basis ◽  
Water Diversion ◽  
Nps Pollution ◽  
Water Diversion Project ◽  
North Water

The quantitative estimation of non-point source (NPS) pollution provides the scientific basis for sustainability in ecologically sensitive regions. This study combined the export coefficient model and Revised Universal Soil Loss Equation to estimate the NPS nitrogen (NPS-N) and NPS phosphorus (NPS-P) loads and then evaluated their relationship with Primary Industrial Output Value (PIOV) in the water source area of the middle route of South-to-North Water Diversion Project (SNWDP) for 2000–2015. The estimated results show that: (1) dissolved nitrogen (DN) load increased 0.55%, and dissolved phosphorus (DP) load decreased 4.60% during the 15 years. Annual loads of adsorbed nitrogen (AN) and adsorbed phosphorus (AP) increased significantly before 2005 and then decreased after 2005. Compared with 2000, AN and AP loads in 2015 significantly decreased by 32.72% and 30.81%, respectively. Hanzhong Basin and Ankang Basin are key areas for controlling dissolved pollution, and southern and northern regions are key areas for adsorbed pollution. (2) From 2000 to 2005, NPS pollutants and PIOV showed weak decoupling status. By 2015, NPS pollutants had strong decoupling from PIOV in most counties. (3) Land use has been the main source of NPS-N and NPS-P pollution, accounting for about 75% of NPS-N and 50% of NPS-P based on the average value over the study period. In the future, various measures—such as returning cropland to forest and reducing the number of livestock—could be adopted to reduce the risk of NPS pollution. NPS pollution caused by livestock was grown over the past 15 years and had not yet been effectively controlled, which still needs to be urgently addressed. Collecting ground monitoring data and revising parameters are effective means to improve the accuracy of simulation, which deserve further study. The results will also provide scientific support for sustainable development in similar regions.

Post-Evaluation of the Ecological and Environmental Impact of Water Diversion Project in the Low Reaches of Heihe River

2012 ◽  
Vol 518-523 ◽  
pp. 1188-1191
Author(s):  
Gui Zhi Wang ◽  
De Shan Tang
Keyword(s):  
Environmental Impact ◽  
Local Environment ◽  
Water Diversion ◽  
Ecological Effect ◽  
Heihe River ◽  
Post Evaluation ◽  
Water Diversion Project ◽  
Ecology And Environment ◽  
Oasis Area ◽  
The Impact

Since 2001, Heihe River began to carry out the project of water transforming, which caused certain effect in the ecology and environment of the whole basin. Analyzing the change of climate, the ground water, the typical plant growth and the oasis area in nearly 10 years, master the impact of water diversion to the downstream ecology and environment. It shows that the implement of the project of water transforming has decreased the desertification area, expanded the oasis area and kept down the trend of decline of a water table, the populus diversifolia and other vegetation began to recover and grow. The water diversion of Heihe River acquired preferably ecological effect; the local environment has made great improvement.

scholarly journals Impact Assessment of Eastern Route of South-to-North Water Diversion Project Operation on Water Environmental of Dongping Lake

2021 ◽  
Vol 276 ◽  
pp. 01006
Author(s):  
Yunxiang Bao
Keyword(s):  
Impact Assessment ◽  
Water Environment ◽  
Assessment System ◽  
Water Diversion ◽  
Ecological Environment ◽  
Fuzzy Evaluation ◽  
Water Diversion Project ◽  
North Water ◽  
Dongping Lake ◽  
The Impact

The Eastern Route of the South-to-North Water Diversion Project is a national strategic measure to improve the water supply conditions of the cities along the route, Jiaodong and Huaibei regions. However, the Water Diversion Project not only brings social and economic benefits, but also changes the hydrological situation and ecological environment of water source area, transfer area and receiving area. In this paper, Dongping Lake is selected as the research object. By using the analytic hierarchy process and fuzzy evaluation method, the index system of the impact assessment of the Eastern route project on the water environment of Dongping Lake is constructed, and a multi-level fuzzy evaluation model is established to conduct quantitative and qualitative research on the impacts of hydrology, meteorology, water ecological environment, soil and other aspects as well as ecological and economic compensation. The analysis results show that the operation of the Eastern route project has brought some negative effects on Dongping Lake, mainly reflected in the aspects of soil, ecological compensation, hydrology and meteorology, and the negative effects on the water ecological environment are light. By studying the impact of the Eastern route project on the water environment of Dongping Lake, this paper aims to improve the environmental impact assessment system for the water receiving area of the Eastern Route of the South-to-North Water Diversion Project, and to provide reference for the research on the environmental impact assessment system for other water diversion projects in China.

Sign in / Sign up

Export Citation Format

Share Document