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Water 2017, 9(8), 557; https://doi.org/10.3390/w9080557

Regional Correlation between Precipitation and Vegetation in the Huang-Huai-Hai River Basin, China

1
State Key Laboratory of Simulation and Regulation of Water Cycle in River Basin, China Institute of Water Resources and Hydropower Research, Beijing 100038, China
2
College of Environmental Science and Engineering, Donghua University, Shanghai 201620, China
3
Changjiang River Scientific Research Institute, Wuhan 430010, China
4
Institute of Water Resources and Hydrology, Department of Hydraulic Engineering, Tsinghua University, Beijing 100084, China
5
General Institute of Water Resources and Hydropower Planning and Design Ministry of Water Resources, Beijing 100120, China
*
Author to whom correspondence should be addressed.
Received: 16 June 2017 / Revised: 17 July 2017 / Accepted: 21 July 2017 / Published: 25 July 2017
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Abstract

In a context of climate change, precipitation patterns show substantial disturbances and the occurrence of precipitation anomalies has tended to increase in the Huang-Huai-Hai River Basin. These anomalies are likely influencing vegetation dynamics and ecosystem stability. This paper aims to have a comprehensive understanding of vegetation growth response towards the precipitation pattern in the Huang-Huai-Hai River Basin. The study used NDVI (Normalized Difference Vegetation Index) data and mapped precipitation datasets from 1982 to 2011. NDVI and precipitation show a similar spatial distribution: they decrease from the southeast coast to the northwest inland. Regions with sparse vegetation are mainly distributed in arid and semi-arid areas or densely-populated areas. Vegetation coverage and the regular precipitation pattern show a positive correlation (61.6% of the whole region), while the correlation between vegetation coverage and precipitation anomalies is negative (62.7% for rainless days and 60.3% for rainstorm days). The clustering result shows that abundant vegetation is mainly situated in high precipitation or low anomaly areas. On the contrary, the degraded regions are mainly distributed in low precipitation or high anomaly areas. However, some special regions, mainly located in the Three North Shelterbelt Program region, the Tibetan Plateau, and other regions along the rivers, present improved vegetation cover when precipitation decreases or extreme events occur. View Full-Text
Keywords: NDVI; vegetation coverage; growing season precipitation; Huang-Huai-Hai river basin NDVI; vegetation coverage; growing season precipitation; Huang-Huai-Hai river basin
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This is an open access article distributed under the Creative Commons Attribution License which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. (CC BY 4.0).
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Yan, D.; Xu, T.; Girma, A.; Yuan, Z.; Weng, B.; Qin, T.; Do, P.; Yuan, Y. Regional Correlation between Precipitation and Vegetation in the Huang-Huai-Hai River Basin, China. Water 2017, 9, 557.

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