Spatiotemporal Variation in the Coupling Relationship between Human Activities and Soil Erosion—A Case Study in the Weihe River Basin

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The objective of this article is to review the historical development of rice–aquatic species (RASp) integration and analyze the factors that affect its performance. Compared to rice monoculture, the integration of the rice–aquatic species system has a more significant impact on farm production, income, land (L), water use efficiency (WUE), net revenue, and labor use efficiency (LBUE) reduction. Although concurrent and alternate cultivations of rice–aquatic species increase unit water efficiency, concurrent cultivation requires 26% more water than monoculture. Furthermore, RASp farming promotes environmentally-friendly rice cultivation by reducing the use of pesticides (insecticides and herbicides), decreasing CH4 emissions by approximately 14.8–22.1%, and enhancing water quality. These findings suggest that fish integration in rice fields could be integrated into extensive aquaculture. Finally, global cooperation is necessary to transfer knowledge about this technology, particularly from China, and more research is needed to evaluate the effects of rice–aquatic species integration in the context of climate change and practical water use efficiency. Additionally, a robust development program at the national and global levels, with regulatory and non-administrative bodies’ guidance and strategy, is needed to embrace the expansion of the rice–aquatic species practice.

Section: Constraints and Challengesmentioning

confidence: 99%

Exploring the Integration of Rice and Aquatic Species: Insights from Global and National Experiences

Ibrahim,

Shaghaleh,

Abu-Hashim

et al. 2023

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“…Nash-Sutcliffe E ciency Coefficie Model calibration period (1)(2)(3)(4)(5)(6) 13.248 0.997 0.994 Model validation period (7)(8)(9)(10)(11)(12)(13) 43.876 0.958 0.958…”

Section: Relative Error Correlation Coefficientmentioning

confidence: 99%

“…With the rapid development of urbanization, the problems of gully erosion and soil erosion caused by large-scale urban construction, transportation network expansion, and agricultural development are becoming increasingly severe. Especially under the double action of high-intensity human activities and frequent rainstorms, the Loess Plateau has become fragmented, seriously threatening the homeland security, livelihood security, and ecological security of the plateau area [4,5]. At the same time, scientific land regulation and soil and water conservation measures play a positive role in the management of small watersheds, ecological environment protection, and agricultural economic development and are considered the main manmade driving factors for the change in hydrological processes in the Loess Plateau.…”

Section: Introductionmentioning

confidence: 99%

Assessment of the Implementation Effect of a Gully Consolidation and Highland Protection (GCHP) Project Based on the GeoWEPP Model

Luo,

Huo,

Yang

et al. 2023

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The Gully Consolidation and Highland Protection (GCHP) project is an important governance measure for controlling source erosion and reducing soil erosion in the Loess Plateau, which has been explored and developed continuously in recent decades. However, there is no international precedent for research on the implementation effect of the GCHP project, and it is still relatively weak. In order to quantify the erosion of a small watershed under the construction of a gully head landfill, this study selected Yangjiagou (YJG) as the research area. The spatial analysis function of ArcGIS was used to process DEM and soil type data, the GeoWEPP model was used to simulate soil erosion, and the changes of runoff and sediment yield before and after gully head landfill were analyzed. The results showed that compared with the simulated original soil erosion amount, the annual runoff decreased by 13.13%, and the sediment yield decreased by 37.61% after gully head landfill, indicating that the GCHP project positively influenced soil erosion control. After the gully head landfill measures are taken, the flow path becomes shorter, so the flow scour capacity is weakened. Soil and water control is very effective in the short term, but if long-term maintenance is not carried out, the intensity of soil and water loss is likely to be aggravated. This study provides an effective verification method for the feasibility of a soil loss control scheme on the Loess Plateau and provides a reference for promoting ecological priority and efficient management in the Loess gully area. Ultimately, it will serve the ecological protection and high-quality development of the Yellow River Basin.

“…Gully erosion severely impacts land resources and causes various environmental problems and geological hazards. Specifically, gully erosion can lead to land degradation, resulting in the loss of valuable land resources [2]. Additionally, the supply and quality of water resources may be affected, leading to floods and water pollution [3,4].…”

Section: Introductionmentioning

confidence: 99%

Impacts of Different Gully Consolidation and Highland Protection Models on the Runoff and Sediment Yield in Small Watershed of the Chinese Loess Plateau—A Case Study of Fengbugou in Qingyang City of Gansu

Zhao,

Huo,

Cheng

et al. 2023

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The Gully Consolidation and Highland Protection (GCHP) project is crucial in preventing gully erosion in the Loess Plateau. However, there are new problems after the completion of the GCHP project, such as secondary disasters caused by sudden changes in water flow paths. To study the impact of different GCHP measures on runoff and sediment production, we conducted a series of scouring experiments using the similarity principle, taking Fengbao Gully, Xifeng District, Qingyang City, Gansu Province, as a prototype. Moreover, three scenarios in the GCHP project (landfill (LT), nondrained terraced (NDT), and terrace with a drainage system (DT)) are established. Seasonal rainfall simulation experiments are conducted with a constant slope. The results showed that during summer rainfall, the 10 min runoff depth of LT is 67.83~276.03% higher than that of NDT. However, in spring and autumn, the runoff depth of NDT is 4.12~39.84% higher than LT’s. The sediment yield of LT is 0.06–5.58 times higher than that of NDT and 1.91–25.58 times higher than that of DT. The sediment yield of NDT is 0.46–4.02 times higher than that of LT and 2.27–23.93 times higher than that of DT, indicating that, under the same conditions, the effect of slope replacement with terraces for GCHP is better than that of gully head landfill in reducing soil erosion and secondary geological disasters. Furthermore, imperfect terrace construction can result in increased sediment yield. This study provides a scientific basis for the maintenance and later management of GCHP and helps implement soil and water conservation measures in similar regions worldwide.