Soil moisture responses under different vegetation types to winter rainfall events in a humid karst region

Wei, Yan; Zhou, Qiuwen; Peng, Dawei; Xin, Wei; Tang, Xin; Yuan, Ershuang; Wang, Yalin; Shi, Chunmao

doi:10.1007/s11356-021-14620-z

Cited by 13 publications

(10 citation statements)

References 44 publications

(37 reference statements)

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“…The actual evapotranspiration was calculated by MODIS ground net evapotranspiration products. Soil moisture affects vegetation growth and hydrological processes, and its change will reflect the water conservation capacity of the basin (Yan et al, 2021; Zhou et al, 2022), which was calculated using the water balance method (Table 3, Formulas 6 and 7). It is worth noting that vegetation interception will eventually be consumed in the form of evapotranspiration; therefore, vegetation interception has already been included in the actual evapotranspiration in MODIS.…”

Section: Methodsmentioning

confidence: 99%

Perspectives of human–water co‐evolution of blue–green water resources in subtropical areas

Pan

Yang

Lou

et al. 2023

Hydrological Processes

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Blue–green water resources and their transformation play a vital role in crop production and ecosystem services regulation, and their distribution and utilization are affected by human activity, such as policy‐driven green water resources development projects. However, it is unclear how policy‐driven green water resources development projects, such as the Grain for Green Project (GGP) in China, affect eco‐environmental quality and socio‐economic development, that is, human–water co‐evolution. Therefore, considering the GGP in a subtropical ungauged basin in southern China as an example, based on remote sensing hydrological station (RSHS) technology and multisource remote sensing data, this study analyzed the impact of the GGP on human–water co‐evolution from the perspective of blue–green water resources. The results show that: (1) From 2001 to 2020 the GGP transformed more blue water resources into green water resources, resulting in an increase in green water resources of 282.29% compared to that of blue water resources. (2) Due to the initial success of the GGP in 2005, there was a distinct positive correlation between the green water coefficient (GWC) and basin development index (BDI) from 2005 to 2020 (R2 = 0.70, p < 0.05), indicating that the GGP did not cause conflict between the sustainability of socio‐economic development and the health of the ecological environment. (3) In the GGP scenario, in which the cultivated land area maintained 50% of the current decreasing rate, the overall efficiency index maintain a continuously increasing trend at an average rate of 0.001 year−1 from 2021 to 2050, which not only improved the eco‐environmental quality but also met cultivated land demand. This research reveals the role of GGP in promoting the transformation from blue to green water resources, and proves the feasibility of the simultaneous promotion of GGP and socio‐economic development, providing significant insights for the promotion of policy‐driven green water resources development projects and long‐term blue–green water resources planning and management in other countries or regions.

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Section: Methodsmentioning

confidence: 99%

Perspectives of human–water co‐evolution of blue–green water resources in subtropical areas

Pan

Yang

Lou

et al. 2023

Hydrological Processes

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“…Heavy rains showed the highest mean and maximum wetting front velocity (WFV), which accelerated the movement of soil water within the entire soil profile (Tables 3, 4). However, a continuous input of high-intensity rainfall may surpass the maximum rate of soil permeability and limit the soil water infiltration in the shallow layer (Yan et al, 2021), resulting in the shortest duration and the slowest permeating velocity of the 10-cm depth (Tables 3 and 4). Compared with heavy rains, intermediate rains (Group II) showed the shallowest RD (Figure 3) but the shortest response time (RT) and the fastest WFV of the 10-cm SM (Tables 3, 4).…”

Section: Effect Of Rainfall On Soil Moisture Dynamicsmentioning

confidence: 99%

Land cover changes the soil moisture response to rainfall on the Loess Plateau

Gong

et al. 2022

Hydrological Processes

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Insight into the rainfall-soil moisture (SM) response to land cover is critical for soil hydrological process modelling and management. In this study, five typical land-cover types (forest, shrub, grass, crop and bare land) and four rainfall patterns (heavy, intermediate, light and continuous rains) were selected to assess the effects of SM response characteristics on the Loess Plateau of China. We monitored SM at five depths on each land-cover type at 1-h intervals over the growing season of 2019.The results showed that rainfall patterns and land-cover types together determined the SM response process and infiltration efficiency. A minimum accumulated rainfall amount of 5 mm was the threshold required to trigger a 10-cm SM response. Rain events with a higher intensity and smaller total rainfall amount triggered a quick surface SM response, while larger amounts could percolate deeper and faster. Landcover change significantly altered the rainfall-SM response dynamics and rainwater utilization efficiency after 20 years of ecological construction. Revegetation sites (mean values of forest, shrub and grass) increased the soil wetting depth by 14.7%, shortened the SM response time by 27.3%, and accelerated the SM wetting front velocity by 67.2%, which promoted a 35.2% rainfall transformation rate (RTR) across the 1-m profile over all rainfall events (R 1-13 ). Moreover, planted forest showed the highest RTR of R 1-13 and the maximal increase in soil water storage, which did not aggravate the soil water deficit across the 1-m profile over the growing season.Therefore, we present evidence that planted forests, instead of shrubs, may be beneficial for water conservation if precipitation is greater than 550 mm. The findings of this study prove the role of revegetation on rainwater infiltration capacity and efficiency and can help improve the management of afforestation in arid and semiarid regions.

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“…The karst areas of Southwest China are typically characterized by high spatial heterogeneity [60,61], the soil moisture is primarily regionally varied, and its influencing factors are complex and diverse [17][18][19]. Climate change and human activities are two dominating factors affecting soil moisture temporal variation trends, but most studies have focused on small scales [9][10][11][12], such as plot, slope, and small watershed scales, which are unsuitable for illustrating the soil moisture trends and their influencing factors regionally. Overall, the individual contributions of climate change and human activities to temporal variation trends of regional soil moisture remain uncertain [13][14][15][16].…”

Section: The Contributions and Implications Of This Studymentioning

confidence: 99%

“…Many scholars have studied the temporal variation trends of soil moisture and its influencing factors. For example, based on the "space series instead of time series" method, Zhou et al highlighted that the succession of grassland to shrub and woodland would decrease the soil moisture content, and the shrubland is characterized by a more robust soil water conservation capacity than other land types in dry seasons [9,10]. Fu et al found that the soil moisture content of natural forestland was higher than that of abandoned and sloping farmlands, and the artificial forestland exhibited the lowest soil moisture content [11].…”

Section: Introductionmentioning

confidence: 99%

Temporal Variation of Soil Moisture and Its Influencing Factors in Karst Areas of Southwest China from 1982 to 2015

Xin

Gao

Liu

et al. 2022

Water

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Climate change and human activities are two dominating factors affecting soil moisture temporal variation trends, whereas their individual contributions to soil moisture trends still remain uncertain in the karst areas of Southwest China. Based on the linear regression trend analysis, Mann–Kendall mutation detection, and residual analysis methods, we quantified the contributions of climate change and human activities to soil moisture temporal variation trends in the karst areas of Southwest China. The results showed that the soil moisture in the study area experienced a drying trend from 1982 to 2015. The mutated year was 1999, and the soil moisture decreasing trend was more evident from 2000 to 2015 than from 1982 to 1999. Human activities and climate change accounted for 59% and 41%, respectively, of soil moisture drying trends. Owing to the spatial heterogeneity of geomorphic features, the individual contributions of climate change and human activities to soil moisture trends exhibited regional differences. Although remarkable regional vegetation restoration was found since applying the Grain for Green Project, the negative impact of vegetation restoration on soil moisture cannot be neglected. This study is a quantitative analysis of the relative impacts of climate change and human activities on soil moisture trends, and our findings provide a theoretical reference for the sustainable use of soil water resources in the karst areas of Southwest China.

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Soil moisture responses under different vegetation types to winter rainfall events in a humid karst region

Cited by 13 publications

References 44 publications

Perspectives of human–water co‐evolution of blue–green water resources in subtropical areas

Perspectives of human–water co‐evolution of blue–green water resources in subtropical areas

Land cover changes the soil moisture response to rainfall on the Loess Plateau

Temporal Variation of Soil Moisture and Its Influencing Factors in Karst Areas of Southwest China from 1982 to 2015

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