Next Article in Journal
First Catch Your Fish: Designing a “Low Energy Fish” Label
Previous Article in Journal
Notes on the Quality of Life of Artisanal Small-Scale Fishermen along the Pacific Coast of Jalisco, México
Previous Article in Special Issue
A Hybrid Inexact Optimization Method for Land-Use Allocation in Association with Environmental/Ecological Requirements at a Watershed Level
Open AccessArticle

The Temporal and Spatial Evolution of Water Yield in Dali County

by Jing Yu 1,*, Yongwei Yuan 1,†, Yan Nie 2,†, Enjun Ma 3, Hongji Li 1 and Xiaoli Geng 1
1
Faculty of Resources and Environmental Science, Hubei University, Wuhan 430062, China
2
College of Urban & Environmental Sciences, Central China Normal University, Wuhan 430079, China
3
School of Mathematics and Physics, China University of Geosciences (Wuhan), Wuhan 430074, China
*
Author to whom correspondence should be addressed.
These authors contributed equally to this work.
Academic Editors: Xiangzheng Deng and Ram Babu Singh
Sustainability 2015, 7(5), 6069-6085; https://doi.org/10.3390/su7056069
Received: 30 November 2014 / Revised: 21 April 2015 / Accepted: 22 April 2015 / Published: 18 May 2015
Water yield is of great importance to the balance between supply and demand of water resources. The provision of freshwater for Dali is estimated and mapped in 1988, 1995, 2000, 2005 and 2008, using the Integrated Valuation of Environmental Services and Tradeoffs (InVEST) modeling toolset. The stability of water yield’s spatial variation is analyzed by a sorting method. The factors are explored which lead to the change in the relative water yield capacity. The yields at five points in time are compared, and the result of which shows a sharp fluctuation. The water yield curve is of a similar waveform as precipitation. An obvious and relatively stable spatial variation appears for water yield. The highest water yield areas are mainly located in the area where the elevation is high and both the elevation and the slope changes are large, and the main land uses are Shrub Land and High Coverage Grassland. The lowest areas are mainly in the eastern part of Erhai or the surrounding area. Precipitation, construction land expansion and the implementation of policy on land use are the three main factors which contribute to the change of the relative water yield capacity during 1988–2008 in Dali. In the study area, the water yield appears highly sensitive to the change in precipitation. The elasticity coefficient is calculated to illustrate the sensitivity of the water yield to the precipitation. When the elasticity index is larger, the risk of natural disaster will be higher. View Full-Text
Keywords: water yield; spatial variation; relative capacity; sensitivity water yield; spatial variation; relative capacity; sensitivity
Show Figures

Figure 1

MDPI and ACS Style

Yu, J.; Yuan, Y.; Nie, Y.; Ma, E.; Li, H.; Geng, X. The Temporal and Spatial Evolution of Water Yield in Dali County. Sustainability 2015, 7, 6069-6085.

Show more citation formats Show less citations formats

Article Access Map by Country/Region

1
Only visits after 24 November 2015 are recorded.
Back to TopTop