Quantifying the connections-linkages between land-use and water in the Kathmandu Valley, Nepal.

摘要: Land development without thoughtful water supply planning can lead to unsustainability. In practice, management of our lands and waters is often unintegrated. We present new land-use, ecological stream health, quality, streamflow data from nine perennial watersheds in the Kathmandu Valley, Nepal, 2016 monsoon (i.e., August September) 2017 pre-monsoon April May) periods. Our goal was improve understanding longitudinal linkages between land-use water. At a total 38 locations, Rapid Stream Assessment (RSA) protocol used characterize ecology, basic quality parameters were collected with handheld WTW multi-parameter meter, flow measured SonTek FlowTracker Acoustic Doppler Velocimeter. A pixel-based supervised classification method create 30-m gridded land use coverage Landsat 8 image scene captured fall 2015. results indicated that had statistically significant impact on built land-uses (high low) having greatest influence. Upstream locations six investigated near natural status river class (RQC) 1) could be for all purposes (after standard treatments as required). However, downstream RSA measurements RQC 5 most highly impaired). Generally, deteriorated 2017. findings reinforce importance integrated highlight urgency addressing waste issues Valley.