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Land Use/Cover Change in the Middle Reaches of the Heihe River Basin over 2000-2011 and Its Implications for Sustainable Water Resource Management.

Hu X, Lu L, Li X, Wang J, Guo M - PLoS ONE (2015)

Bottom Line: From the 1960s to the 1990s, the downstream flow in the HRB declined as a result of large, artificial changes in the distribution of water and land and a lack of effective water resource management.The results show that the most significant land use/cover change in the middle reaches of the HRB was the continuous expansion of farmland for economic interests.The results of this study can also serve as a reference for the sustainable management of water resources in other arid inland river basins.

View Article: PubMed Central - PubMed

Affiliation: Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 320 Donggang West Road, Lanzhou, 730000, China.

ABSTRACT
The Heihe River Basin (HRB) is a typical arid inland river basin in northwestern China. From the 1960s to the 1990s, the downstream flow in the HRB declined as a result of large, artificial changes in the distribution of water and land and a lack of effective water resource management. Consequently, the ecosystems of the lower reaches of the basin substantially deteriorated. To restore these degraded ecosystems, the Ecological Water Diversion Project (EWDP) was initiated by the Chinese government in 2000. The project led to agricultural and ecological changes in the middle reaches of the basin. In this study, we present three datasets of land use/cover in the middle reaches of the HRB derived from Landsat TM/ETM+ images in 2000, 2007 and 2011. We used these data to investigate changes in land use/cover between 2000 and 2011 and the implications for sustainable water resource management. The results show that the most significant land use/cover change in the middle reaches of the HRB was the continuous expansion of farmland for economic interests. From 2000 to 2011, the farmland area increased by 12.01%. The farmland expansion increased the water resource stress; thus, groundwater was over-extracted and the ecosystem was degraded in particular areas. Both consequences are negative and potentially threaten the sustainability of the middle reaches of the HRB and the entire river basin. Local governments should therefore improve the management of water resources, particularly groundwater management, and should strictly control farmland reclamation. Then, water resources could be ecologically and socioeconomically sustained, and the balance between upstream and downstream water demands could be ensured. The results of this study can also serve as a reference for the sustainable management of water resources in other arid inland river basins.

No MeSH data available.


Maps of land use/cover in the study area over 2000–2011 (case 1 was a typical example of land use/cover change driven by migrants).
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pone.0128960.g002: Maps of land use/cover in the study area over 2000–2011 (case 1 was a typical example of land use/cover change driven by migrants).

Mentions: Desert, farmland and grassland are the largest and most widely distributed types of land use/cover in the middle reaches of the HRB (Fig 2). Desert is mainly located in the piedmont region of the study area. Farmland is mainly located along a corridor that follows the Heihe River and on either side of irrigation canals. Grassland is mainly located in the northern mountains, hills, within the transition zone between the mountains and plains, and along oasis edges. Forestland is mainly located in the transition zone between oasis and desert, in overflow land, and in areas of desert surrounded by oases. Built-up land in the countryside is dominated by residential areas and is located on both sides of roads and on both sides of the river. Wetlands are mainly found in the suburbs of Ganzhou District and in Yanchi, Gaotai County.


Land Use/Cover Change in the Middle Reaches of the Heihe River Basin over 2000-2011 and Its Implications for Sustainable Water Resource Management.

Hu X, Lu L, Li X, Wang J, Guo M - PLoS ONE (2015)

Maps of land use/cover in the study area over 2000–2011 (case 1 was a typical example of land use/cover change driven by migrants).
© Copyright Policy
Related In: Results  -  Collection

License
Show All Figures
getmorefigures.php?uid=PMC4482701&req=5

pone.0128960.g002: Maps of land use/cover in the study area over 2000–2011 (case 1 was a typical example of land use/cover change driven by migrants).
Mentions: Desert, farmland and grassland are the largest and most widely distributed types of land use/cover in the middle reaches of the HRB (Fig 2). Desert is mainly located in the piedmont region of the study area. Farmland is mainly located along a corridor that follows the Heihe River and on either side of irrigation canals. Grassland is mainly located in the northern mountains, hills, within the transition zone between the mountains and plains, and along oasis edges. Forestland is mainly located in the transition zone between oasis and desert, in overflow land, and in areas of desert surrounded by oases. Built-up land in the countryside is dominated by residential areas and is located on both sides of roads and on both sides of the river. Wetlands are mainly found in the suburbs of Ganzhou District and in Yanchi, Gaotai County.

Bottom Line: From the 1960s to the 1990s, the downstream flow in the HRB declined as a result of large, artificial changes in the distribution of water and land and a lack of effective water resource management.The results show that the most significant land use/cover change in the middle reaches of the HRB was the continuous expansion of farmland for economic interests.The results of this study can also serve as a reference for the sustainable management of water resources in other arid inland river basins.

View Article: PubMed Central - PubMed

Affiliation: Cold and Arid Regions Environmental and Engineering Research Institute, Chinese Academy of Sciences, 320 Donggang West Road, Lanzhou, 730000, China.

ABSTRACT
The Heihe River Basin (HRB) is a typical arid inland river basin in northwestern China. From the 1960s to the 1990s, the downstream flow in the HRB declined as a result of large, artificial changes in the distribution of water and land and a lack of effective water resource management. Consequently, the ecosystems of the lower reaches of the basin substantially deteriorated. To restore these degraded ecosystems, the Ecological Water Diversion Project (EWDP) was initiated by the Chinese government in 2000. The project led to agricultural and ecological changes in the middle reaches of the basin. In this study, we present three datasets of land use/cover in the middle reaches of the HRB derived from Landsat TM/ETM+ images in 2000, 2007 and 2011. We used these data to investigate changes in land use/cover between 2000 and 2011 and the implications for sustainable water resource management. The results show that the most significant land use/cover change in the middle reaches of the HRB was the continuous expansion of farmland for economic interests. From 2000 to 2011, the farmland area increased by 12.01%. The farmland expansion increased the water resource stress; thus, groundwater was over-extracted and the ecosystem was degraded in particular areas. Both consequences are negative and potentially threaten the sustainability of the middle reaches of the HRB and the entire river basin. Local governments should therefore improve the management of water resources, particularly groundwater management, and should strictly control farmland reclamation. Then, water resources could be ecologically and socioeconomically sustained, and the balance between upstream and downstream water demands could be ensured. The results of this study can also serve as a reference for the sustainable management of water resources in other arid inland river basins.

No MeSH data available.