Mon Oct 13, F. Flechtner
• Sorted by Date • Sorted by Last Name of First Author •
Zhang, Xunhe, Wang, Nai'ang, Xie, Zunyi, Ma, Xuanlong, and Huete, Alfredo, 2018. Water Loss Due to Increasing Planted Vegetation over the Badain Jaran Desert, China. Remote Sensing, 10(1):134, doi:10.3390/rs10010134.
• from the NASA Astrophysics Data System • by the DOI System •
@ARTICLE{2018RemS...10..134Z,
author = {{Zhang}, Xunhe and {Wang}, Nai'ang and {Xie}, Zunyi and {Ma}, Xuanlong and {Huete}, Alfredo},
title = "{Water Loss Due to Increasing Planted Vegetation over the Badain Jaran Desert, China}",
journal = {Remote Sensing},
keywords = {arid lands, ecohydrology, precipitation, human influences, planted vegetation},
year = 2018,
month = jan,
volume = {10},
number = {1},
eid = {134},
pages = {134},
abstract = "{Water resources play a vital role in ecosystem stability, human
survival, and social development in drylands. Human activities,
such as afforestation and irrigation, have had a large impact on
the water cycle and vegetation in drylands over recent years.
The Badain Jaran Desert (BJD) is one of the driest regions in
China with increasing human activities, yet the connection
between human management and the ecohydrology of this area
remains largely unclear. In this study, we firstly investigated
the ecohydrological dynamics and their relationship across
different spatial scales over the BJD, using multi-source
observational data from 2001 to 2014, including: total water
storage anomaly (TWSA) from Gravity Recovery and Climate
Experiment (GRACE), normalized difference vegetation index
(NDVI) from Moderate Resolution Imaging Spectroradiometer
(MODIS), lake extent from Landsat, and precipitation from in
situ meteorological stations. We further studied the response of
the local hydrological conditions to large scale vegetation and
climatic dynamics, also conducting a change analysis of water
levels over four selected lakes within the BJD region from 2011.
To normalize the effect of inter-annual variations of
precipitation on vegetation, we also employed a relationship
between annual average NDVI and annual precipitation, or
modified rain-use efficiency, termed the RUE$_{mo}$. A focus of
this study is to understand the impact of the increasing planted
vegetation on local ecohydrological systems over the BJD region.
Results showed that vegetation increases were largely found to
be confined to the areas intensely influenced by human
activities, such as croplands and urban areas. With
precipitation patterns remaining stable during the study period,
there was a significant increasing trend in vegetation greenness
per unit of rainfall, or RUE$_{mo}$ over the BJD, while at the
same time, total water storage as measured by satellites has
been continually decreasing since 2003. This suggested that the
increased trend in vegetation and apparent increase in
RUE$_{mo}$ can be attributed to the extraction of ground water
for human-planted irrigated vegetation. In the hinterland of the
BJD, we identified human-planted vegetation around the lakes
using MODIS observations and field investigations. Four lake
basins were chosen to validate the relationship between lake
levels and planted vegetation. Our results indicated that
increasing human-planted vegetation significantly increased the
water loss over the BJD region. This study highlights the value
of combining observational data from space-borne sensors and
ground instruments to monitor the ecohydrological dynamics and
the impact of human activities on water resources and ecosystems
over the drylands.}",
doi = {10.3390/rs10010134},
adsurl = {https://ui.adsabs.harvard.edu/abs/2018RemS...10..134Z},
adsnote = {Provided by the SAO/NASA Astrophysics Data System}
}
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