Sensitivity analysis of runoff to climate variability and land-use changes in the Haihe Basin mountainous area of north China

2019 ◽  
Vol 269 ◽  
pp. 193-203 ◽  
Author(s):  
Dandan Wang ◽  
Xinxiao Yu ◽  
Guodong Jia ◽  
Henian Wang
Keyword(s):  
Land Use ◽  
Sensitivity Analysis ◽  
Climate Variability ◽  
North China ◽  
Land Use Changes ◽  
Mountainous Area

Impacts of climate and land use changes on water variability, using a Budyko framework: case study in Gansu, China

2021 ◽  
Author(s):  
Qing He ◽  
Kwok Pan Chun ◽  
Omer Yetemen ◽  
Bastien Dieppois ◽  
Liang Chen ◽  
...  
Keyword(s):  
Land Use ◽  
Food Security ◽  
Climate Variability ◽  
El Niño ◽  
El Nino ◽  
Land Use Changes ◽  
Runoff Generation ◽  
Local Water ◽  
Climate Transition ◽  
Water And Food Security

<p>Disentangling the effects of climate and land use changes on regional hydrological conditions is critical for local water and food security. The water variability over climate transition regions at the midlatitudes is sensitive to changes in regional climate and land use. Gansu, located in northwest China, is a midlatitude climate transition region with sharp climate and vegetation gradients. In this study, the effects of climate and land‑use changes on water balances are investigated over Gansu between 1981 and 2015 using a Budyko framework. Results show that there is reduced runoff generation potential over Gansu during 1981 and 2015, especially in the southern part of the region. Based on statistical scaling relationships, local runoff generation potential over Gansu are related to the El Nino-Southern Oscillation (ENSO). Intensified El Nino conditions weaken the Asian monsoons, leading to precipitation deficits over Gansu. Moreover, the regional evapotranspiration (ET) is increasing due to the warming temperature. The decreasing precipitation and increasing ET cause the decline of runoff generation potential over Gansu. Using the dynamical downscaling model outputs, the Budyko analysis indicates that increasing coverage of forests and croplands may lead to higher ET and may reduce runoff generation potential over Gansu. Moreover, the contributions of climate variability and land‑use changes vary spatially. In the southwest part of Gansu, the impacts of climate variability on water variations are larger (around 80%) than that of land‑use changes (around 20%), while land use changes are the dominant drivers of water variability in the southeast part of the region. The decline of runoff generation potential reveals a potential risk for local water and food security over Gansu. The water‑resource assessment approach developed in this study is applicable for collaborative planning at other climate transition regions at the midlatitudes with complex climate and land types for the Belt and Road Initiative.</p>

scholarly journals Implications of Human Activities, Land Use Changes and Climate Variability in Mediterranean Lakes of Greece

Water ◽  
2016 ◽  
Vol 8 (11) ◽  
pp. 483 ◽  
Author(s):  
Konstantinos Stefanidis ◽  
Aikaterini Kostara ◽  
Eva Papastergiadou
Keyword(s):  
Land Use ◽  
Climate Variability ◽  
Human Activities ◽  
Land Use Changes ◽  
Mediterranean Lakes ◽  
Of Greece

scholarly journals Effects of Land Use Changes on Streamflow and Sediment Yield in Atibaia River Basin—SP, Brazil

Water ◽  
2020 ◽  
Vol 12 (6) ◽  
pp. 1711 ◽  
Author(s):  
Franciane Mendonça dos Santos ◽  
Rodrigo Proença de Oliveira ◽  
José Augusto Di Lollo
Keyword(s):  
Land Use ◽  
Sensitivity Analysis ◽  
River Basin ◽  
Sediment Yield ◽  
Assessment Tool ◽  
Land Use Changes ◽  
Curve Number ◽  
Moisture Condition ◽  
Land Use Scenario ◽  
Effects Of Land Use

The Soil and Water Assessment Tool (SWAT) is often used to evaluate the impacts of different land use scenarios on streamflow and sediment yield, but there is a need for some clear recommendations on how to select the parameter set that defines a given land use scenario and on what is the most appropriate methodology to change the selected parameters when describing possible future conditions. This paper reviews the SWAT formulation to identify the parameters that depend on the land use, performs a sensitivity analysis to determine the ones with larger impacts on the model results and discusses ways to consider future land use conditions. The case study is the Atibaia river basin, with 2838 km2 (São Paulo, Brazil). The parameters identified by sensitivity analysis with the largest impacts on streamflow and sediment yield were the initial curve number for moisture condition II (CN), maximum canopy storage for each land use (CANMX) and the cover and management factor (USLE_C). The identification and appropriate parameter change can provide real estimates of the magnitudes in the land use changes, which were verified in this study. Such information can be used as an instrument for proposing improvements in the basin’s environmental quality and management.

scholarly journals Impacts of climate variability and land-use change on hydrology in the period 1981-2009 in the central highlands of Vietnam

2015 ◽  
Vol 17 (4) ◽  
pp. 870-881 ◽  
Keyword(s):  
Land Use ◽  
Land Use Change ◽  
Climate Variability ◽  
Assessment Tool ◽  
Meteorological Data ◽  
Land Use Changes ◽  
Hydrological Regime ◽  
Hydrological Response ◽  
Central Highlands ◽  
The Impact

<div> <p>In this study, we investigated the separate and combined impacts of climate and land-use changes on hydrological response in the Central Highlands of Vietnam during the period 1981-2009. The Mann-Kendall and Pettit tests were applied to detect the trends in the hydro-meteorological data. The Soil and Water Assessment Tool (SWAT) was setup in the region, and evaluation based on daily data highlights the models adequacy. From this, the responses of hydrology to climate variability and land-use changes were considered. Overall, variability in climate seems to strongly drive the variability in the hydrological response in comparison to alternations in the hydrological regime due to land-use change during the period 1981-2009. The results indicate that land-use change had a minor impact on the annual flow (0.4% reduction), whilst the impact from climate variability had been more significant (13.5% change). Under the impact of coupled climate variability and land-use change, the annual streamflow increased by 13.1%.</p> </div> <p>&nbsp;</p>

scholarly journals Analysis of Climate and Land Use Changes Impacts on Land Degradation in the North China Plain

2015 ◽  
Vol 2015 ◽  
pp. 1-11 ◽  
Author(s):  
Zhihui Li ◽  
Xiangzheng Deng ◽  
Fang Yin ◽  
Cuiyuan Yang
Keyword(s):  
Land Use ◽  
Economic Development ◽  
Land Degradation ◽  
North China Plain ◽  
North China ◽  
Land Use Changes ◽  
Land Quality ◽  
The North ◽  
The North China Plain ◽  
Land Improvement

Land degradation is a complex process which involves both the natural ecosystem and the socioeconomic system, among which climate and land use changes are the two predominant driving factors. To comprehensively and quantitatively analyze the land degradation process, this paper employed the Normalized Difference Vegetation Index (NDVI) as a proxy to assess land degradation and further applied the binary panel logit regression model to analyze the impacts of the driving factors on land degradation in the North China Plain. The results revealed that an increase in rainfall and temperature would significantly and positively contribute to the land improvement, and conversion from cultivated land to grassland and forest land showed positive relationship with land improvement, while conversion to built-up area will lead to land degradation. Besides, human agricultural intensification represented by fertilizer utilization will help to improve the land quality. The economic development may exert positive impacts on land quality to alleviate land degradation, although the rural economic development and agricultural production will exert negative impacts on the land and lead to land degradation. Infrastructure construction would modify the land surface and further resulted in land degradation. The findings of the research will provide scientific information for sustainable land management.

Land use changes from EU biofuel use: a sensitivity analysis

2014 ◽  
Vol 14 (2) ◽  
pp. 261-281 ◽  
Author(s):  
Aikaterini Kavallari ◽  
Edward Smeets ◽  
Andrzej Tabeau
Keyword(s):  
Land Use ◽  
Sensitivity Analysis ◽  
Land Use Changes

scholarly journals Disentangling the historic and future impacts of land use changes and climate variability on the hydrology of a mountain region in Brazil

2020 ◽  
pp. 125650
Author(s):  
L.C. Gomes ◽  
F.J.J.A. Bianchi ◽  
I.M. Cardoso ◽  
R.P.O. Schulte ◽  
R.B.A. Fernandes ◽  
...  
Keyword(s):  
Land Use ◽  
Climate Variability ◽  
Land Use Changes ◽  
Mountain Region

Consequences of Land Use in an Intensive Region in North China Plain

2012 ◽  
Vol 588-589 ◽  
pp. 1999-2002
Author(s):  
Jun Xia Yan ◽  
Jian Feng Zhang
Keyword(s):  
Land Use ◽  
Landscape Change ◽  
Food Production ◽  
North China Plain ◽  
North China ◽  
Land Use Changes ◽  
Soil Survey ◽  
Aerial Photographs ◽  
Sampling Locations ◽  
Natural Landscapes

Land use changes and land intensification has played a more and more important role in food production. The environment has been influenced by it greatly. Land use data were derived from several sources: aerial photographs, current land use maps, Second National Soil Survey (SNSS) map, and fieldwork. The aerial photographs, 1:50,000 for both 1980 and 2006 were obtained from the Department of Surveys and Mapping (DSM). Bulk soil samples were collected at 79 sites across Quzhou district. Samples were collected again at the same locations in 2000 and 2006. To compare the soil data of 2006, 2000 and 1980, latitude and longitude of the sampling locations were recorded using the Global Position System at the time of soil collection. The samples site selection was done on behalf of the Second National Soil Survey. A great change had taken place in land use and land use intensification. The changes, which have converted natural landscapes into the use for human, have made a large proportion of the Quhzou’s landscape change greatly.

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