Evolution of hydrochemistry and water quality of karst groundwater under the effects of intense anthropogenic activities.

Intense anthropogenic activities in a karst area will inevitably change the regional groundwater environment and affect the characteristics of the karst groundwater, such as the hydrochemistry and water quality. It is of great importance to study the evolution characteristics of the hydrochemistry and water quality of karst groundwater under intense anthropogenic activities to ensure the stability and sustainable development of karst ecosystems. In this study, a representative synclinal basin-type karst groundwater system in northern China was used as the study object, and the effects of intense anthropogenic activities on the evolution of the hydrochemistry and water quality of the karst groundwater were analyzed using a comprehensive application of a groundwater quality assessment, a multivariate statistical analysis, a hydrogeochemical analysis, and multi-factor regime monitoring of the karst groundwater quality.

Simulating future land use by coupling ecological security patterns and multiple scenarios.

A land use simulation model with coupling constraints of ecological security patterns (ESPs) and multiple scenarios (MSs) was developed using the PLUS model. The research scale was zoned with environmental functional regions, where land management policies were formulated. A case study in Anji County successfully demonstrated the application of the ESP-MS-PLUS model.

Spatio-Temporal Analysis of Drought Variability Using CWSI in the Koshi River Basin (KRB).

Drought is one of the most frequent meteorological disasters, and has exerted significant impacts on the livelihoods and economy of the Koshi River Basin (KRB). In this study, we assessed drought patterns using the Crop Water Shortage Index (CWSI) based on the MOD16 product for the period between 2000 and 2014. The results revealed that the CWSI based on the MOD16 product can be act as an indicator to monitor the characteristics of the drought.

[Dynamics of regional ecological frangibility under natural hazard stress: a case study in Qingping Town of Sichuan Province, Southwest China].

By using the aerial remote sensing images after May 12, 2008 (the date of catastrophic Wenchuan Earthquake) and the unmanned aircraft vehicle remote sensing images after August 13, 2010 (the date of extraordinary debris flow), and in combining with the land use map (1:10000), topographic map (1:50000), and collected field investigation data of Qingping Town, Mianzhu City of Sichuan Province in 2006, this paper analyzed and evaluated the ecological frangibility of the Town. In the Town, the slightly, lightly, moderately, heavily, and extremely fragile ecological zones after the extraordinary debris flow occupied 1.9%, 7.