Environmental Restoration in the Shiyang River Basin, China: Conservation, Reallocation and More Efficient Use of Water

Zhu, Qinggaozi; Li, Y.

doi:10.1016/j.aqpro.2014.07.005

Cited by 23 publications

(17 citation statements)

References 3 publications

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“…Because irrigation water consumption was strictly limited, the remaining water resources may be available and consumed by vegetation in the ecosystem, leading to ET increases. The results indicate that vegetation has increased since the late 2000s, and these results agree with the results of other studies (e.g., [24,34,35]). However, ET and vegetation cover showed an increasing tendency in the late 2000s (Figures 3 and 8).…”

Section: Factors Possibly Affecting Etsupporting

confidence: 92%

Spatiotemporal Changes in Evapotranspiration from an Overexploited Water Resources Basin in Arid Northern China and Their Implications for Ecosystem Management

et al. 2019

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Evapotranspiration (ET), including evaporation from soil and water surfaces and transpiration from vegetation, influences water distribution in the soil-plant-atmosphere continuum, especially in arid areas where water is a key limiting factor. Therefore, understanding the spatiotemporal dynamics of ET, including its two components of soil evaporation (Es) and vegetation transpiration (Ec), can be useful for water resource management and ecological restoration in arid regions. Based on ET data from 2002 to 2012, the spatiotemporal variations in ET were evaluated in the Shiyang River Basin in arid Northwest China. The results showed the following: (1) spatially, ET decreased from upstream of the Qilian Mountains to the middle and downstream, with a mean annual value of 316 mm; (2) temporally, ET showed a single peak curve throughout the year, with the highest value occurring in summer; (3) ET showed a downward trend (from 350 to 265 mm) before 2009 and thereafter increased (from 265 to 345 mm); and (4) water use efficiency, indicated by the ratio of Ec to ET, was low in the cropland, with a mean value of 50.9%. Further analysis indicates that decreases in ET are mainly caused by vegetation decreases; in contrast, ecological restriction measures and strict water resource management policies in the middle reaches of the basin led to ET increases. It is concluded that understanding ET and its two components can elucidate the connections between water and human society.Sustainability 2019, 11, 445 2 of 13 flow, is dynamic in nature. In addition, the hydrologic process is intimately linked with energy exchanges between the atmosphere, ocean, and land, and the hydrologic system determines the spatiotemporal distribution of water resources [3,4], which are necessary for sustaining life on Earth. Under such conditions, quantifying the key hydrologic variables in space is required to provide a deep understanding and a detailed analysis of land surface processes; in turn, this knowledge provides crucial information for water resource management and informs policy decisions to enhance sustainable development [5,6].Arid regions, accounting for one-third of the Earth's terrestrial area [7], are particularly short of water. Water is a major limiting factor for the growth and development of vegetation in arid regions [2,8]. As such, sustainable development in arid regions unquestionably requires sustainable water resource management [2,5,[8][9][10]. Precipitation and ET, the two vertical water fluxes, dominate arid hydrologic systems; the former is relatively low, whereas the latter, including evaporation from soil and water surfaces and transpiration from vegetation, is potentially high. Studies have revealed that land surface ET typically consumes approximately 60-90% of precipitation [11][12][13]. Therefore, an accurate assessment of the characteristics of the spatiotemporal distribution of ET can provide fundamental information for studying the feedback mechanism between vegetation and water [5,8,14].The Shiyang River Basin, ...

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Section: Factors Possibly Affecting Etsupporting

confidence: 92%

Spatiotemporal Changes in Evapotranspiration from an Overexploited Water Resources Basin in Arid Northern China and Their Implications for Ecosystem Management

et al. 2019

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“…In fact, Cassiano et al (2014) considered the factors such as slope, soil texture and stream distance in order to propose a method that assessed the contribution of the forest patches to water conservation and defined the priority areas for forest restoration. Zhu and Li (2014) defined forest restoration, aiming at conservation and the more efficient use of water, based on the actual land use and the efficiency of the irrigation systems employed in the region studied. Orsi and Geneletti (2010) identified the priority areas in the landscape for forest restoration, utilizing a set of ecological and socioeconomic criteria.…”

Section: Introductionmentioning

confidence: 99%

Priority areas for forest restoration aiming at the conservation of water resources

Vettorazzi

Valente

2016

Ecological Engineering

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“…Vegetation recovered from overgrazing quickly [41] and logistic pattern was detected in Region 4. KGPSRB, invested largely by Chinese government was carried out in years of 2006-2011 [46]. In order to increase runoff and reduce groundwater extraction in the downstream area, the traditional crop plantings were replaced by protected agriculture (sunglass/plastic greening house) and large areas of croplands in Minqin Oasis were abandoned.…”

Section: Sitementioning

confidence: 99%

Detecting Patterns of Vegetation Gradual Changes (2001–2017) in Shiyang River Basin, Based on a Novel Framework

Xie

Wang

et al. 2019

Remote Sensing

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A lot of timeseries satellite products have been well documented in exploring changes in ecosystems. However, algorithms allowing for measuring the directions, magnitudes, and timing of vegetation change, evaluating the major driving factors, and eventually predicting the future trends are still insufficient. A novel framework focusing on addressing this problem was proposed in this study according to the temporal trajectory of Normalized Difference Vegetation Index (NDVI) timeseries of Moderate Resolution Imaging Spectroradiometer (MODIS). It divided the inter-annual changes in vegetation into four patterns: linear, exponential, logarithmic, and logistic. All the three non-linear patterns were differentiated automatically by fitting a logistic function with prolonged NDVI timeseries. Finally, features of vegetation changes including where, when and how, were evaluated by the parameters in the logistic function. Our results showed that 87.39% of vegetation covered areas (maximum mean growing season NDVI in the 17 years not less than 0.2) in the Shiyng River basin experienced significant changes during 2001–2017. The linear pattern, exponential pattern, logarithmic pattern, and logistic pattern accounted for 36.53%, 20.16%, 15.42%, and 15.27%, respectively. Increasing trends were dominant in all the patterns. The spatial distribution in both the patterns and the transition years at which vegetation gains/losses began or ended is of high consistency. The main years of transition for the exponential increasing pattern, the logarithmic increasing pattern, and the logarithmic increasing pattern were 2008–2011, 2003–2004, and 2009–2010, respectively. The period of 2006–2008 was the foremost period that NDVIs started to decline in Liangzhou Oasis and Minqin Oasis where almost all the decreasing patterns were concentrated. Potential disturbances of vegetation gradual changes in the basin are refer to as urbanization, expansion or reduction of agricultural oases, as well as measures in ecological projects, such as greenhouses building, afforestation, grazing prohibition, etc.

show abstract

Environmental Restoration in the Shiyang River Basin, China: Conservation, Reallocation and More Efficient Use of Water

Cited by 23 publications

References 3 publications

Spatiotemporal Changes in Evapotranspiration from an Overexploited Water Resources Basin in Arid Northern China and Their Implications for Ecosystem Management

Spatiotemporal Changes in Evapotranspiration from an Overexploited Water Resources Basin in Arid Northern China and Their Implications for Ecosystem Management

Priority areas for forest restoration aiming at the conservation of water resources

Detecting Patterns of Vegetation Gradual Changes (2001–2017) in Shiyang River Basin, Based on a Novel Framework

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