Ecological effects and potential risks of the water diversion project in the Heihe River Basin

Zhang, Mengmeng; Wang, Shuai; Fu, Bojie; Gao, Guangyao; Shen, Qin

doi:10.1016/j.scitotenv.2017.11.037

Cited by 94 publications

(49 citation statements)

References 33 publications

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“…The Heihe River Basin (HRB) originates in the Qilian Mountains, and discharges into Juyanhai Lake. It is located along the land and maritime Silk Roads ("One Belt, One Road") between 97.1 • E-102.0 • E and 37.7 • N-42.7 • N, with a total area of approximately 1.43 × 10 5 km 2 [45][46][47]. The second largest inland river located in northwest China, the Heihe River is divided into three reaches (upper (UHRB), middle (MHRB), and lower) by two hydrological stations (Yingluoxia and Zhengyixia).…”

Section: Study Areamentioning

confidence: 99%

“…Nearly 70% of the total precipitation occurs between June and September, with only 3.5% falling between December and February [49,50]. Annual precipitation ranges from 69 to 216 mm in the MHRB, and this area consumes large amounts of water via a relatively complete agricultural irrigation system consisting of more than 893 main canals and branch canals [47]. Over 90% of the population, grain production and major industries are concentrated in the MHRB.…”

Section: Study Areamentioning

confidence: 99%

See 1 more Smart Citation

Relationships between Spatial and Temporal Variations in Precipitation, Climatic Indices, and the Normalized Differential Vegetation Index in the Upper and Middle Reaches of the Heihe River Basin, Northwest China

Zhong

Cheng

2019

Water

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Changes in precipitation are critical indicators of climate change. In this study, the daily precipitation records from 10 meteorological stations in the Heihe River Basin, Northwest China from 1961–2016, precipitation indices, climate indices, and the normalized differential vegetation index (NDVI) were investigated using the Pearson, Kendall, and Spearman correlation coefficients; Theil-Sen Median; Mann–Kendall test; and wavelet coherence. The results indicated that the occurrences (fractional contributions) of 1–2-day wet periods were 81.3% (93.9%) and 55.3% (82.1%) in the upper (UHRB) and middle (MHRB) reaches of the Heihe River Basin, respectively. The spatial distribution of the occurrences (fractional contributions) was almost consistent with non-significant increases/decreases at stations. The ATP, ATD, API, and AMRD increased, while precipitation regimes suggest that dry seasons are getting wetter, and wet seasons are getting drier, although these changes were not significant. Wavelet coherence analyses showed that climate indices influenced precipitation, mainly its concentration, on a 4- to 78.6-month timescale. The Pearson, Kendall, and Spearman correlation coefficients showed weak lagged linkages between precipitation and the North Arctic Oscillation (NAO), Pacific Decadal Oscillation (PDO), and Atlantic Multidecadal Oscillation (AMO). The NDVI of grasslands, meadows and coniferous forests was significantly and positively correlated with precipitation, while the NDVI of alpine vegetation, swamps and shrubs was negatively and significantly correlated with precipitation in the UHRB. The NDVI of grasslands was significantly and positively correlated, but the NDVI of shrubs, coniferous forests and cultivated vegetation was negatively and significantly correlated with precipitation in the MHRB. The correlation between cultivated vegetation and natural precipitation in the MHRB may have been weakened by human activities.

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Section: Study Areamentioning

confidence: 99%

Section: Study Areamentioning

confidence: 99%

Relationships between Spatial and Temporal Variations in Precipitation, Climatic Indices, and the Normalized Differential Vegetation Index in the Upper and Middle Reaches of the Heihe River Basin, Northwest China

Zhong

Cheng

2019

Water

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“…The implementation area of the Chinese ecowater conveyance project was mainly concentrated in inland river basins such as the Tarim River, Heihe River Basin, and Shiyang River Basin. Some studies have summarized the experience and results of ecological water conveyance in the Tarim river basin [5] and the Heihe basin [18] and found that the efficiency of single artificial river water conveyance is low. Therefore, opening up a multichannel water delivery model is also an effective way to improve water-use efficiency and restore the ecological environment.…”

Section: Reflection On Ecological Water Conveyance Modementioning

confidence: 99%

“…However, such practices have also resulted in soil and water salinization in the downstream areas [5]. The ecological water diversion policy of the Heihe River Basin has also realized the sustainable development of the ecological environment of its lower reaches (Juyan Lake basin), but it has also led to the continuous decline of the groundwater level in the middle reaches of the Heihe River Basin [17,18].…”

mentioning

confidence: 99%

Effects of Ecological Water Conveyance on the Hydrochemistry of a Terminal Lake in an Inland River: A Case Study of Qingtu Lake in the Shiyang River Basin

Zhu

Yang

et al. 2019

Water

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Along with the growth of the population and economic and social development, water consumption in the upper-middle reaches of inland rivers is increasing, which has resulted in long-term cutout in the lower reaches of the river, shrinkage and drying up of the wetlands around the terminal lakes, and has caused a series of ecological problems at the same time. In order to protect the fragile ecological environment, comprehensive harnessing projects have been carried out in many inland river basins in China, in which adopting ecological water conveyance to rehabilitate degraded terminal lakes and wetlands is an important means. From June 2014 to October 2017, the water in the upper-middle reaches of the Shiyang River Basin and the lake water of the terminal lake after ecological water conveyance was sampled. The effects of ecological water conveyance on the characteristics of surface water and groundwater were analyzed using, for example, the Piper triangle diagram, Gibbs boomerang envelope model, and mixing diagram. After ecological water conveyance, the ion concentration of water in Qingtu Lake was higher overall, and ion concentration of water in the unstable catchment was higher than that of the stable catchment. The time variation was characterized as high in the summer half year and low in the winter half year. The water of Qingtu Lake is of high and large salinity, and its hydrochemical type is Na-SO 4 (Cl), which is obviously different from the water in the middle-upper reaches of the Shiyang River Basin. The effects of silicate weathering and evaporation crystallization are the main factors leading to the high ion concentration in the water of Qingtu Lake. Ecological water conveyance and the strong evaporation of arid areas have intensified the salinization of water and soils in Qingtu Lake. Meanwhile, implementing the ecological water conveyance policy in the terminal lake has also led to shortage of water resources for agricultural irrigation in the middle reaches of the Shiyang River Basin. The serial negative ecological effects of the ecological water conveyance should be emphasized.

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“…The study area (97.1 • E-102.0 • E and 37.7 • N-42.7 • N) was located in an oasis-desert agricultural region in the middle reaches of the Heihe River Basin (HRB) ( Figure 1). The climate was continental, with an average annual temperature of 7.5 • C, an average annual rainfall of 136.8 mm, and an average annual potential evaporation of 1840 mm [41]. The dominant landscapes in the region were an artificial oasis, the Gobi Desert, and transitional zones between oasis and desert.…”

Section: Study Areamentioning

confidence: 99%

Continuous Daily Evapotranspiration Estimation at the Field-Scale over Heterogeneous Agricultural Areas by Fusing ASTER and MODIS Data

Zhao

Jiang

2018

Remote Sensing

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Continuous daily evapotranspiration (ET) monitoring at the field-scale is crucial for water resource management in irrigated agricultural areas in arid regions. Here, an integrated framework for daily ET, with the required spatiotemporal resolution, is described. Multi-scale surface energy balance algorithm evaluations and a data fusion algorithm are combined to optimally exploit the spatial and temporal characteristics of image datasets, collected by the advanced space-borne thermal emission reflectance radiometer (ASTER) and the moderate resolution imaging spectroradiometer (MODIS). Through combination with a linear unmixing-based method, the spatial and temporal adaptive reflectance fusion model (STARFM) is modified to generate high-resolution ET estimates for heterogeneous areas. The performance of this methodology was evaluated for irrigated agricultural fields in arid and semiarid areas of Northwest China. Compared with the original STARFM, a significant improvement in daily ET estimation accuracy was obtained by the modified STARFM (overall mean absolute percentage error (MAP): 12.9% vs. 17.2%; overall mean absolute percentage error (RMSE): 0.7 mm d−1 vs. 1.2 mm d−1). The modified STARFM additionally preserved more spatial details than the original STARFM for heterogeneous agricultural fields, and provided field-to-field variability in water use. Improvements were further evident in the continuous daily ET, where the day-to-day dynamics of ET estimates were captured. ET data fusion provides a unique means of monitoring continuous daily crop ET values at the field-scale in agricultural areas, and may have value in supporting operational water management decisions.

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Ecological effects and potential risks of the water diversion project in the Heihe River Basin

Cited by 94 publications

References 33 publications

Relationships between Spatial and Temporal Variations in Precipitation, Climatic Indices, and the Normalized Differential Vegetation Index in the Upper and Middle Reaches of the Heihe River Basin, Northwest China

Relationships between Spatial and Temporal Variations in Precipitation, Climatic Indices, and the Normalized Differential Vegetation Index in the Upper and Middle Reaches of the Heihe River Basin, Northwest China

Effects of Ecological Water Conveyance on the Hydrochemistry of a Terminal Lake in an Inland River: A Case Study of Qingtu Lake in the Shiyang River Basin

Continuous Daily Evapotranspiration Estimation at the Field-Scale over Heterogeneous Agricultural Areas by Fusing ASTER and MODIS Data

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