Impoundment-induced stoichiometric imbalance exacerbated …
Nonetheless, research remains relatively limited on phytoplankton limiting factors and nutrient stoichiometry interactions in subtropical impoundment reservoirs. This study fills a critical gap in the current research by providing a comprehensive assessment of the influences of N and P on phytoplankton biomass in Lake Qiandaohu, China.
Mitigating adverse impacts of reservoir impoundment on lake …
2024年4月20日 · However, the impoundment of the reservoirs reduces the release during the impoundment period and directly alters the runoff, sediment, and water quality in downstream rivers, which have become a most critical factor that leads to the decline of lake resources and threaten the ecological health of lakes (Liu et al., 2017; Zhang et al., 2020 ...
Identify and map coastal aquaculture ponds and their drainage …
2024年11月1日 · As shown in Fig. 6, during both drainage and impoundment phases, Dynamic World showed drawbacks by commonly identifying non-water as water, thus failing to accurately extract all coastal aquaculture ponds and underestimating drainage phase. Furthermore, the temporal resolution of Dynamic World was lower because it was based on Sentinel-2 images.
The mechanism of large-scale river valley deformation induced by ...
2024年1月1日 · After the impoundment of Xiluodu, the water level holes in the downstream valley showed a significant rise in groundwater, which attains a favorable positive correlation with the reservoir level (Yin et al., 2020), as shown in Fig. 15. The monitored water level in the downstream valley shows a significant difference between Baihetan and Xiluodu.
Attribution analysis of hydrological drought after the …
2024年12月1日 · The impoundment of Danjiangkou Reservoir was in 1968 and the operation of SNWDP was in 2014. According to the results of the mutation point identification, the whole period (1956–2022) was subdivided into four sub-periods: the baseline period (1956–1967), impacted period Ⅰ (1968–1990), impacted period Ⅱ (1991–2013) and impacted ...
Coupling effect of impoundment and irrigation on landslide …
2024年5月1日 · Following the first impoundment, water–rock interaction made the reservoir slope more active and its deformation mechanism more complex. To examine the factors influencing landslide movement after impoundment, we plotted the LOS displacement time series of the 47 detected active landslides in the MEGR, as shown in Fig. 10.
Response of a landslide to reservoir impoundment in model tests
2018年12月20日 · The influences of reservoir impoundment on the thrust load, time to failure, deformation pattern, and slip surfaces within the landslide were measured and are presented. The results of soil pressure measurements were helpful in detecting progressive soil movements within the landslide and for obtaining the slip surface location.
Impoundment intensity determines temporal patterns of …
2019年1月1日 · However, limnological succession and ecological processes can differ significantly between dammed rivers and regulated lakes (Hall et al., 1999). Thus far, understanding the environmental and ecological consequences of lake impoundment is often constrained by insufficient monitoring data that can cover the pre-damming period.
Catastrophic mass flows resulting from tailings impoundment …
2021年10月1日 · Helicopter videos of the impoundment captured 8 h after failure showed active sheet erosion of tailings, dendritic drainage channels and cirque-like arcuate headscarps (Fig. 6; Morgenstern et al., 2015). As the steep scarps kept migrating headward due to fluvial erosion, the height drop in the headscarp enhanced pond drainage from farther ends ...
Anthropogenic sediment retention: major global impact from …
2003年10月1日 · The accumulated impoundment capacity of the LRs analyzed here is nearly 5000 km 3 (Table 2), which is noteworthy from the standpoint of representing more than four times the mean instantaneous standing stock of water held globally by river networks without impoundment (Covich, 1993). Mean, discharge-weighted residence time change for the 633 ...