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首页> 外文期刊>Catena: An Interdisciplinary Journal of Soil Science Hydrology-Geomorphology Focusing on Geoecology and Landscape Evolution >State and trends of hillslope erosion across New South Wales, Australia
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State and trends of hillslope erosion across New South Wales, Australia

机译：澳大利亚新南威尔士州山坡侵蚀的国家和趋势

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摘要

Hillslope erosion is a widespread natural hazard which often causes land and water quality degradation. Consistent and continuous erosion monitoring will help identify the impact of land management practices and improve soil condition. This paper presents an improved modeling approach for monitoring and predicting hillslope erosion on monthly basis over New South Wales (NSW), Australia by using the most recent time-series fractional vegetation cover data, regional climate projections and the Revised Universal Soil Loss Equation. The time-series estimation was used to analyze the state and trends of hillslope erosion, identifying the places and times of greatest erosion hazard. The average hillslope erosion rate for the current period (2000-2017) was estimated at 0.85 Mg ha(-1) yr(-1) over NSW. The areas with high erosion risk was the North Coast, Hunter and Greater Sydney regions with erosion rates of 4.04, 3.74 and 3.06 Mg ha(-1) yr(-1) respectively. The Western region had the lowest hillslope erosion risk (0.11 Mg ha(-1) yr(-1)) due to its flat terrain. Hillslope erosion in NSW was generally decreasing over the past 18 years, with a reduction of 16% in the recent three years (2015-2017) compared to the previous 15-year (2000-14). However, the future hillslope erosion is predicted to increase about 7-21% in the next 60 years due to the likely increase in extreme rainfall events and decrease in groundcover. The methodology and datasets used in this study are general, thus they have the potential to be applied elsewhere.
机译：Hillslope Erosion是一种广泛的自然危害，往往会导致土地和水质降解。一致和持续的侵蚀监测将有助于确定土地管理实践的影响，提高土壤条件。本文通过使用最近的时间序列分数植被覆盖数据，区域气候预测和修订的通用土壤损失方程，提出了一种改进的监测和预测山坡侵蚀的建模方法。时间序列估计用于分析山坡侵蚀的状态和趋势，识别最大的侵蚀危险的地方和时间。目前期间（2000-2017）的平均山坡腐蚀速率估计在NSW上的0.85mg HA（-1）Yr（-1）。具有高侵蚀风险的地区是北海岸，猎人和大悉尼区，侵蚀率为4.04,3.74和3.06 mg ha（-1）Yr（-1）。由于其平坦的地形，西部地区的山坡侵蚀风险（0.11mg HA（-1）YR（-1））。在过去的18年中，南威尔士州北魏姆斯洛侵蚀通常在近年来减少了16％（2015-2017）的减少，而前15年（2000-14）。然而，由于极端降雨事件可能的可能性增加和地下筹款减少，预计未来山坡侵蚀预计将在未来60年内增加约7-21％。本研究中使用的方法和数据集是一般的，因此它们有可能在其他地方应用。

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